257679954780 has 48 divisors (see below), whose sum is σ = 725534651520. Its totient is φ = 68330771008.

The previous prime is 257679954769. The next prime is 257679954787. The reversal of 257679954780 is 87459976752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257679954787) 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, 11985534 + ... + 12007013.

It is an arithmetic number, because the mean of its divisors is an integer number (15115305240).

Almost surely, 2^257679954780 is an apocalyptic number.

257679954780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257679954780 is an abundant number, since it is smaller than the sum of its proper divisors (467854696740).

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

257679954780 is a wasteful number, since it uses less digits than its factorization.

257679954780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23992738 (or 23992736 counting only the distinct ones).

The product of its (nonzero) digits is 266716800, while the sum is 69.

The spelling of 257679954780 in words is "two hundred fifty-seven billion, six hundred seventy-nine million, nine hundred fifty-four thousand, seven hundred eighty".