63454606527661 has 4 divisors (see below), whose sum is σ = 64651863254652. Its totient is φ = 62257349800672.

The previous prime is 63454606527659. The next prime is 63454606527671. The reversal of 63454606527661 is 16672560645436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29474963937225 + 33979642590436 = 5429085^2 + 5829206^2 .

It is a cyclic number.

It is not a de Polignac number, because 63454606527661 - 2¹ = 63454606527659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63454606527661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63454606527671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598628363416 + ... + 598628363521.

It is an arithmetic number, because the mean of its divisors is an integer number (16162965813663).

Almost surely, 2^{63454606527661} is an apocalyptic number.

It is an amenable number.

63454606527661 is a deficient number, since it is larger than the sum of its proper divisors (1197256726991).

63454606527661 is a wasteful number, since it uses less digits than its factorization.

63454606527661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197256726990.

The product of its (nonzero) digits is 130636800, while the sum is 61.

The spelling of 63454606527661 in words is "sixty-three trillion, four hundred fifty-four billion, six hundred six million, five hundred twenty-seven thousand, six hundred sixty-one".