256233167398 has 32 divisors (see below), whose sum is σ = 431268717600. Its totient is φ = 113361970176.

The previous prime is 256233167389. The next prime is 256233167413. The reversal of 256233167398 is 893761332652.

It is a super-2 number, since 2×256233167398² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117611 + ... + 1327222.

It is an arithmetic number, because the mean of its divisors is an integer number (13477147425).

Almost surely, 2^256233167398 is an apocalyptic number.

256233167398 is a deficient number, since it is larger than the sum of its proper divisors (175035550202).

256233167398 is a wasteful number, since it uses less digits than its factorization.

256233167398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445016.

The product of its digits is 9797760, while the sum is 55.

The spelling of 256233167398 in words is "two hundred fifty-six billion, two hundred thirty-three million, one hundred sixty-seven thousand, three hundred ninety-eight".