256197477702 has 16 divisors (see below), whose sum is σ = 512883428400. Its totient is φ = 85317747072.

The previous prime is 256197477673. The next prime is 256197477749. The reversal of 256197477702 is 207774791652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20346223 + ... + 20358810.

It is an arithmetic number, because the mean of its divisors is an integer number (32055214275).

Almost surely, 2^256197477702 is an apocalyptic number.

256197477702 is an abundant number, since it is smaller than the sum of its proper divisors (256685950698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256197477702 is a wasteful number, since it uses less digits than its factorization.

256197477702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40706087.

The product of its (nonzero) digits is 10372320, while the sum is 57.

The spelling of 256197477702 in words is "two hundred fifty-six billion, one hundred ninety-seven million, four hundred seventy-seven thousand, seven hundred two".