3897686295657 has 160 divisors (see below), whose sum is σ = 7298151404544. Its totient is φ = 2022247166400.

The previous prime is 3897686295557. The next prime is 3897686295743. The reversal of 3897686295657 is 7565926867983.

3897686295657 is a `hidden beast` number, since 389 + 76 + 86 + 2 + 95 + 6 + 5 + 7 = 666.

It is not a de Polignac number, because 3897686295657 - 2¹¹ = 3897686293609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (3897686295557) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2380992643 + ... + 2380994279.

Almost surely, 2^{3897686295657} is an apocalyptic number.

It is an amenable number.

3897686295657 is a deficient number, since it is larger than the sum of its proper divisors (3400465108887).

3897686295657 is an equidigital number, since it uses as much as digits as its factorization.

3897686295657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253 (or 3229 counting only the distinct ones).

The product of its digits is 8230118400, while the sum is 81.

The spelling of 3897686295657 in words is "three trillion, eight hundred ninety-seven billion, six hundred eighty-six million, two hundred ninety-five thousand, six hundred fifty-seven".