8451385657 has 16 divisors (see below), whose sum is σ = 9936605952. Its totient is φ = 7086568320.

The previous prime is 8451385601. The next prime is 8451385667. The reversal of 8451385657 is 7565831548.

It is not a de Polignac number, because 8451385657 - 2¹⁹ = 8450861369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8451385667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167493 + ... + 212029.

It is an arithmetic number, because the mean of its divisors is an integer number (621037872).

Almost surely, 2^8451385657 is an apocalyptic number.

It is an amenable number.

8451385657 is a deficient number, since it is larger than the sum of its proper divisors (1485220295).

8451385657 is a wasteful number, since it uses less digits than its factorization.

8451385657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45888.

The product of its digits is 4032000, while the sum is 52.

The square root of 8451385657 is about 91931.4182257622. The cubic root of 8451385657 is about 2036.9293847272.

The spelling of 8451385657 in words is "eight billion, four hundred fifty-one million, three hundred eighty-five thousand, six hundred fifty-seven".