256409246154 has 32 divisors (see below), whose sum is σ = 514501790400. Its totient is φ = 85189536000.

The previous prime is 256409246153. The next prime is 256409246167. The reversal of 256409246154 is 451642904652.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256409246153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3064872 + ... + 3147420.

It is an arithmetic number, because the mean of its divisors is an integer number (16078180950).

Almost surely, 2^256409246154 is an apocalyptic number.

256409246154 is an abundant number, since it is smaller than the sum of its proper divisors (258092544246).

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

256409246154 is a wasteful number, since it uses less digits than its factorization.

256409246154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84246.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 256409246154 in words is "two hundred fifty-six billion, four hundred nine million, two hundred forty-six thousand, one hundred fifty-four".