61351307636 has 6 divisors (see below), whose sum is σ = 107364788370. Its totient is φ = 30675653816.

The previous prime is 61351307617. The next prime is 61351307663. The reversal of 61351307636 is 63670315316.

It can be written as a sum of positive squares in only one way, i.e., 61129595536 + 221712100 = 247244^2 + 14890^2 .

It is a super-2 number, since 2×61351307636² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61351307593 and 61351307602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7668913451 + ... + 7668913458.

It is an arithmetic number, because the mean of its divisors is an integer number (17894131395).

Almost surely, 2^61351307636 is an apocalyptic number.

It is an amenable number.

61351307636 is a deficient number, since it is larger than the sum of its proper divisors (46013480734).

61351307636 is a wasteful number, since it uses less digits than its factorization.

61351307636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15337826913 (or 15337826911 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 41.

The spelling of 61351307636 in words is "sixty-one billion, three hundred fifty-one million, three hundred seven thousand, six hundred thirty-six".