1353221645631 has 16 divisors (see below), whose sum is σ = 1848751285248. Its totient is φ = 879930564800.

The previous prime is 1353221645627. The next prime is 1353221645639. The reversal of 1353221645631 is 1365461223531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1353221645631 - 2² = 1353221645627 is a prime.

It is a super-2 number, since 2×1353221645631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353221645639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 825285 + ... + 1840526.

It is an arithmetic number, because the mean of its divisors is an integer number (115546955328).

Almost surely, 2^{1353221645631} is an apocalyptic number.

1353221645631 is a deficient number, since it is larger than the sum of its proper divisors (495529639617).

1353221645631 is a wasteful number, since it uses less digits than its factorization.

1353221645631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669982.

The product of its digits is 388800, while the sum is 42.

The spelling of 1353221645631 in words is "one trillion, three hundred fifty-three billion, two hundred twenty-one million, six hundred forty-five thousand, six hundred thirty-one".