6489279736857 has 12 divisors (see below), whose sum is σ = 9373814414640. Its totient is φ = 4325997098808.

The previous prime is 6489279736843. The next prime is 6489279736859. The reversal of 6489279736857 is 7586379729846.

It is a happy number.

6489279736857 is a `hidden beast` number, since 6 + 489 + 2 + 7 + 9 + 73 + 68 + 5 + 7 = 666.

It is not a de Polignac number, because 6489279736857 - 2⁷ = 6489279736729 is a prime.

It is a super-2 number, since 2×6489279736857² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6489279736859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15565543 + ... + 15977004.

It is an arithmetic number, because the mean of its divisors is an integer number (781151201220).

Almost surely, 2^{6489279736857} is an apocalyptic number.

It is an amenable number.

6489279736857 is a deficient number, since it is larger than the sum of its proper divisors (2884534677783).

6489279736857 is a wasteful number, since it uses less digits than its factorization.

6489279736857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31565412 (or 31565409 counting only the distinct ones).

The product of its digits is 7681443840, while the sum is 81.

The spelling of 6489279736857 in words is "six trillion, four hundred eighty-nine billion, two hundred seventy-nine million, seven hundred thirty-six thousand, eight hundred fifty-seven".