9478695723257 has 32 divisors (see below), whose sum is σ = 10009857795840. Its totient is φ = 8958168299520.

The previous prime is 9478695723253. The next prime is 9478695723281. The reversal of 9478695723257 is 7523275968749.

It is not a de Polignac number, because 9478695723257 - 2² = 9478695723253 is a prime.

It is a super-2 number, since 2×9478695723257² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9478695723253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 712838033 + ... + 712851329.

It is an arithmetic number, because the mean of its divisors is an integer number (312808056120).

Almost surely, 2^{9478695723257} is an apocalyptic number.

It is an amenable number.

9478695723257 is a deficient number, since it is larger than the sum of its proper divisors (531162072583).

9478695723257 is a wasteful number, since it uses less digits than its factorization.

9478695723257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14513.

The product of its digits is 1600300800, while the sum is 74.

The spelling of 9478695723257 in words is "nine trillion, four hundred seventy-eight billion, six hundred ninety-five million, seven hundred twenty-three thousand, two hundred fifty-seven".