256731377302 has 4 divisors (see below), whose sum is σ = 385097065956. Its totient is φ = 128365688650.

The previous prime is 256731377299. The next prime is 256731377389. The reversal of 256731377302 is 203773137652.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×256731377302² (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 as a sum of consecutive naturals, namely, 64182844324 + ... + 64182844327.

It is an arithmetic number, because the mean of its divisors is an integer number (96274266489).

Almost surely, 2^256731377302 is an apocalyptic number.

256731377302 is a deficient number, since it is larger than the sum of its proper divisors (128365688654).

256731377302 is a wasteful number, since it uses less digits than its factorization.

256731377302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128365688653.

The product of its (nonzero) digits is 1111320, while the sum is 46.

The spelling of 256731377302 in words is "two hundred fifty-six billion, seven hundred thirty-one million, three hundred seventy-seven thousand, three hundred two".