15664405611357 has 20 divisors (see below), whose sum is σ = 24206808164220. Its totient is φ = 10082835794304.

The previous prime is 15664405611341. The next prime is 15664405611373. The reversal of 15664405611357 is 75311650446651.

15664405611357 is a `hidden beast` number, since 1 + 5 + 6 + 6 + 4 + 40 + 561 + 1 + 35 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (15664405611341) and next prime (15664405611373).

It can be written as a sum of positive squares in 2 ways, for example, as 9951210938916 + 5713194672441 = 3154554^2 + 2390229^2 .

It is not a de Polignac number, because 15664405611357 - 2⁴ = 15664405611341 is a prime.

It is a super-2 number, since 2×15664405611357² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15664405612357) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3334268748 + ... + 3334273445.

It is an arithmetic number, because the mean of its divisors is an integer number (1210340408211).

Almost surely, 2^{15664405611357} is an apocalyptic number.

It is an amenable number.

15664405611357 is a deficient number, since it is larger than the sum of its proper divisors (8542402552863).

15664405611357 is an equidigital number, since it uses as much as digits as its factorization.

15664405611357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6668542234 (or 6668542225 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 15664405611357 in words is "fifteen trillion, six hundred sixty-four billion, four hundred five million, six hundred eleven thousand, three hundred fifty-seven".