857512863506 has 32 divisors (see below), whose sum is σ = 1497527693760. Its totient is φ = 364811242176.

The previous prime is 857512863479. The next prime is 857512863541. The reversal of 857512863506 is 605368215758.

It is a happy number.

It is a super-2 number, since 2×857512863506² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23439236 + ... + 23475791.

It is an arithmetic number, because the mean of its divisors is an integer number (46797740430).

Almost surely, 2^857512863506 is an apocalyptic number.

857512863506 is a deficient number, since it is larger than the sum of its proper divisors (640014830254).

857512863506 is a wasteful number, since it uses less digits than its factorization.

857512863506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46915098.

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 857512863506 in words is "eight hundred fifty-seven billion, five hundred twelve million, eight hundred sixty-three thousand, five hundred six".