256161261724473 has 32 divisors (see below), whose sum is σ = 398778498478080. Its totient is φ = 143215859525760.

The previous prime is 256161261724469. The next prime is 256161261724507. The reversal of 256161261724473 is 374427162161652.

It is not a de Polignac number, because 256161261724473 - 2² = 256161261724469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256161261722473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40125988 + ... + 46069701.

It is an arithmetic number, because the mean of its divisors is an integer number (12461828077440).

Almost surely, 2^{256161261724473} is an apocalyptic number.

It is an amenable number.

256161261724473 is a deficient number, since it is larger than the sum of its proper divisors (142617236753607).

256161261724473 is a wasteful number, since it uses less digits than its factorization.

256161261724473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86198757.

The product of its digits is 20321280, while the sum is 57.

The spelling of 256161261724473 in words is "two hundred fifty-six trillion, one hundred sixty-one billion, two hundred sixty-one million, seven hundred twenty-four thousand, four hundred seventy-three".