257400078654 has 16 divisors (see below), whose sum is σ = 515305370880. Its totient is φ = 85715823960.

The previous prime is 257400078631. The next prime is 257400078709. The reversal of 257400078654 is 456870004752.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21043942 + ... + 21056169.

It is an arithmetic number, because the mean of its divisors is an integer number (32206585680).

Almost surely, 2^257400078654 is an apocalyptic number.

257400078654 is an abundant number, since it is smaller than the sum of its proper divisors (257905292226).

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

257400078654 is a wasteful number, since it uses less digits than its factorization.

257400078654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42101135.

The product of its (nonzero) digits is 1881600, while the sum is 48.

The spelling of 257400078654 in words is "two hundred fifty-seven billion, four hundred million, seventy-eight thousand, six hundred fifty-four".