256011478154 has 8 divisors (see below), whose sum is σ = 393383490948. Its totient is φ = 124883647840.

The previous prime is 256011478153. The next prime is 256011478193. The reversal of 256011478154 is 451874110652.

It can be written as a sum of positive squares in 2 ways, for example, as 252390688225 + 3620789929 = 502385^2 + 60173^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (256011478153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561045517 + ... + 1561045680.

Almost surely, 2^256011478154 is an apocalyptic number.

256011478154 is a deficient number, since it is larger than the sum of its proper divisors (137372012794).

256011478154 is a wasteful number, since it uses less digits than its factorization.

256011478154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3122091240.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 256011478154 in words is "two hundred fifty-six billion, eleven million, four hundred seventy-eight thousand, one hundred fifty-four".