256099374772 has 6 divisors (see below), whose sum is σ = 448173905858. Its totient is φ = 128049687384.

The previous prime is 256099374719. The next prime is 256099374781. The reversal of 256099374772 is 277473990652.

It can be written as a sum of positive squares in only one way, i.e., 252924503056 + 3174871716 = 502916^2 + 56346^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256099374772.

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, 32012421843 + ... + 32012421850.

Almost surely, 2^256099374772 is an apocalyptic number.

It is an amenable number.

256099374772 is a deficient number, since it is larger than the sum of its proper divisors (192074531086).

256099374772 is a wasteful number, since it uses less digits than its factorization.

256099374772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64024843697 (or 64024843695 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 61.

The spelling of 256099374772 in words is "two hundred fifty-six billion, ninety-nine million, three hundred seventy-four thousand, seven hundred seventy-two".