1356640466531 has 16 divisors (see below), whose sum is σ = 1556380455168. Its totient is φ = 1158392037600.

The previous prime is 1356640466497. The next prime is 1356640466539.

1356640466531 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-1356640466531 is a prime.

It is a super-2 number, since 2×1356640466531² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1356640466531.

It is not an unprimeable number, because it can be changed into a prime (1356640466539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1703276 + ... + 2369478.

It is an arithmetic number, because the mean of its divisors is an integer number (97273778448).

Almost surely, 2^{1356640466531} is an apocalyptic number.

1356640466531 is a deficient number, since it is larger than the sum of its proper divisors (199739988637).

1356640466531 is an equidigital number, since it uses as much as digits as its factorization.

1356640466531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667322.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 1356640466531 in words is "one trillion, three hundred fifty-six billion, six hundred forty million, four hundred sixty-six thousand, five hundred thirty-one".