64158157 has 4 divisors (see below), whose sum is σ = 73323616. Its totient is φ = 54992700.

The previous prime is 64158151. The next prime is 64158161. The reversal of 64158157 is 75185146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75185146 = 2 ⋅37592573.

It is a de Polignac number, because none of the positive numbers 2^k-64158157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64158151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4582719 + ... + 4582732.

It is an arithmetic number, because the mean of its divisors is an integer number (18330904).

Almost surely, 2^64158157 is an apocalyptic number.

It is an amenable number.

64158157 is a deficient number, since it is larger than the sum of its proper divisors (9165459).

64158157 is an equidigital number, since it uses as much as digits as its factorization.

64158157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9165458.

The product of its digits is 33600, while the sum is 37.

The square root of 64158157 is about 8009.8787131891. The cubic root of 64158157 is about 400.3292227067.

The spelling of 64158157 in words is "sixty-four million, one hundred fifty-eight thousand, one hundred fifty-seven".