257415780087 has 16 divisors (see below), whose sum is σ = 403789459680. Its totient is φ = 161515783296.

The previous prime is 257415780079. The next prime is 257415780109. The reversal of 257415780087 is 780087514752.

257415780087 is a `hidden beast` number, since 25 + 7 + 41 + 578 + 0 + 0 + 8 + 7 = 666.

It is not a de Polignac number, because 257415780087 - 2³ = 257415780079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257415781087) 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, 280408888 + ... + 280409805.

It is an arithmetic number, because the mean of its divisors is an integer number (25236841230).

Almost surely, 2^257415780087 is an apocalyptic number.

257415780087 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

257415780087 is a deficient number, since it is larger than the sum of its proper divisors (146373679593).

257415780087 is a wasteful number, since it uses less digits than its factorization.

257415780087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560818719 (or 560818713 counting only the distinct ones).

The product of its (nonzero) digits is 4390400, while the sum is 54.

The spelling of 257415780087 in words is "two hundred fifty-seven billion, four hundred fifteen million, seven hundred eighty thousand, eighty-seven".