256724102167142 has 4 divisors (see below), whose sum is σ = 385086153250716. Its totient is φ = 128362051083570.

The previous prime is 256724102167097. The next prime is 256724102167187. The reversal of 256724102167142 is 241761201427652.

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

It is an interprime number because it is at equal distance from previous prime (256724102167097) and next prime (256724102167187).

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, 64181025541784 + ... + 64181025541787.

It is an arithmetic number, because the mean of its divisors is an integer number (96271538312679).

Almost surely, 2^{256724102167142} is an apocalyptic number.

256724102167142 is a deficient number, since it is larger than the sum of its proper divisors (128362051083574).

256724102167142 is a wasteful number, since it uses less digits than its factorization.

256724102167142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128362051083573.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 256724102167142 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, one hundred two million, one hundred sixty-seven thousand, one hundred forty-two".