1604134625657 has 4 divisors (see below), whose sum is σ = 1655880903936. Its totient is φ = 1552388347380.

The previous prime is 1604134625617. The next prime is 1604134625663. The reversal of 1604134625657 is 7565264314061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1604134625657 - 2²⁴ = 1604117848441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604134625617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25873139093 + ... + 25873139154.

It is an arithmetic number, because the mean of its divisors is an integer number (413970225984).

Almost surely, 2^{1604134625657} is an apocalyptic number.

It is an amenable number.

1604134625657 is a deficient number, since it is larger than the sum of its proper divisors (51746278279).

1604134625657 is an equidigital number, since it uses as much as digits as its factorization.

1604134625657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51746278278.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 1604134625657 in words is "one trillion, six hundred four billion, one hundred thirty-four million, six hundred twenty-five thousand, six hundred fifty-seven".