864647157 has 16 divisors (see below), whose sum is σ = 1258693632. Its totient is φ = 523601520.

The previous prime is 864647131. The next prime is 864647167. The reversal of 864647157 is 751746468.

It is not a de Polignac number, because 864647157 - 2⁸ = 864646901 is a prime.

It is a super-2 number, since 2×864647157² = 1495229412216365298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864647167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33108 + ... + 53154.

It is an arithmetic number, because the mean of its divisors is an integer number (78668352).

Almost surely, 2^864647157 is an apocalyptic number.

It is an amenable number.

864647157 is a deficient number, since it is larger than the sum of its proper divisors (394046475).

864647157 is a wasteful number, since it uses less digits than its factorization.

864647157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21368.

The product of its digits is 1128960, while the sum is 48.

The square root of 864647157 is about 29404.8832169080. The cubic root of 864647157 is about 952.6783722270.

The spelling of 864647157 in words is "eight hundred sixty-four million, six hundred forty-seven thousand, one hundred fifty-seven".