15652990953557 has 2 divisors, whose sum is σ = 15652990953558. Its totient is φ = 15652990953556.

The previous prime is 15652990953553. The next prime is 15652990953629. The reversal of 15652990953557 is 75535909925651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15643338087556 + 9652866001 = 3955166^2 + 98249^2 .

It is a cyclic number.

It is not a de Polignac number, because 15652990953557 - 2² = 15652990953553 is a prime.

It is a super-2 number, since 2×15652990953557² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15652990953553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7826495476778 + 7826495476779.

It is an arithmetic number, because the mean of its divisors is an integer number (7826495476779).

Almost surely, 2^{15652990953557} is an apocalyptic number.

It is an amenable number.

15652990953557 is a deficient number, since it is larger than the sum of its proper divisors (1).

15652990953557 is an equidigital number, since it uses as much as digits as its factorization.

15652990953557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 574087500, while the sum is 71.

The spelling of 15652990953557 in words is "fifteen trillion, six hundred fifty-two billion, nine hundred ninety million, nine hundred fifty-three thousand, five hundred fifty-seven".