64118157 has 4 divisors (see below), whose sum is σ = 85490880. Its totient is φ = 42745436.

The previous prime is 64118149. The next prime is 64118177. The reversal of 64118157 is 75181146.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 64118157 - 2³ = 64118149 is a prime.

It is a super-2 number, since 2×64118157² = 8222276114153298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64118177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10686357 + ... + 10686362.

It is an arithmetic number, because the mean of its divisors is an integer number (21372720).

Almost surely, 2^64118157 is an apocalyptic number.

It is an amenable number.

64118157 is a deficient number, since it is larger than the sum of its proper divisors (21372723).

64118157 is a wasteful number, since it uses less digits than its factorization.

64118157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21372722.

The product of its digits is 6720, while the sum is 33.

The square root of 64118157 is about 8007.3814071768. The cubic root of 64118157 is about 400.2460090845.

The spelling of 64118157 in words is "sixty-four million, one hundred eighteen thousand, one hundred fifty-seven".