256773682348154 has 4 divisors (see below), whose sum is σ = 385160523522234. Its totient is φ = 128386841174076.

The previous prime is 256773682348151. The next prime is 256773682348247. The reversal of 256773682348154 is 451843286377652.

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

It can be written as a sum of positive squares in only one way, i.e., 242661465984025 + 14112216364129 = 15577595^2 + 3756623^2 .

It is not an unprimeable number, because it can be changed into a prime (256773682348151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64193420587037 + ... + 64193420587040.

Almost surely, 2^{256773682348154} is an apocalyptic number.

256773682348154 is a deficient number, since it is larger than the sum of its proper divisors (128386841174080).

256773682348154 is a wasteful number, since it uses less digits than its factorization.

256773682348154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128386841174079.

The product of its digits is 1625702400, while the sum is 71.

The spelling of 256773682348154 in words is "two hundred fifty-six trillion, seven hundred seventy-three billion, six hundred eighty-two million, three hundred forty-eight thousand, one hundred fifty-four".