257102420539 has 8 divisors (see below), whose sum is σ = 265923689472. Its totient is φ = 248314129320.

The previous prime is 257102420483. The next prime is 257102420567. The reversal of 257102420539 is 935024201752.

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

It is a cyclic number.

It is not a de Polignac number, because 257102420539 - 2²⁵ = 257068866107 is a prime.

It is a super-2 number, since 2×257102420539² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257102420579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8228569 + ... + 8259754.

It is an arithmetic number, because the mean of its divisors is an integer number (33240461184).

Almost surely, 2^257102420539 is an apocalyptic number.

257102420539 is a deficient number, since it is larger than the sum of its proper divisors (8821268933).

257102420539 is a wasteful number, since it uses less digits than its factorization.

257102420539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16488857.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 257102420539 in words is "two hundred fifty-seven billion, one hundred two million, four hundred twenty thousand, five hundred thirty-nine".