7645137633257 has 4 divisors (see below), whose sum is σ = 7645198080000. Its totient is φ = 7645077186516.

The previous prime is 7645137633239. The next prime is 7645137633281. The reversal of 7645137633257 is 7523367315467.

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 7645137633257 - 2²⁴ = 7645120856041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7645137633196 and 7645137633205.

It is not an unprimeable number, because it can be changed into a prime (7645137663257) 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, 30033257 + ... + 30286742.

It is an arithmetic number, because the mean of its divisors is an integer number (1911299520000).

Almost surely, 2^{7645137633257} is an apocalyptic number.

It is an amenable number.

7645137633257 is a deficient number, since it is larger than the sum of its proper divisors (60446743).

7645137633257 is a wasteful number, since it uses less digits than its factorization.

7645137633257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60446742.

The product of its digits is 66679200, while the sum is 59.

The spelling of 7645137633257 in words is "seven trillion, six hundred forty-five billion, one hundred thirty-seven million, six hundred thirty-three thousand, two hundred fifty-seven".