64156938 has 8 divisors (see below), whose sum is σ = 128313888. Its totient is φ = 21385644.

The previous prime is 64156919. The next prime is 64156943. The reversal of 64156938 is 83965146.

It is a sphenic number, since it is the product of 3 distinct primes.

64156938 is an admirable number.

It is a super-2 number, since 2×64156938² = 8232225387071688, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64156938.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5346406 + ... + 5346417.

It is an arithmetic number, because the mean of its divisors is an integer number (16039236).

Almost surely, 2^64156938 is an apocalyptic number.

64156938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64156938 is a wasteful number, since it uses less digits than its factorization.

64156938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10692828.

The product of its digits is 155520, while the sum is 42.

The square root of 64156938 is about 8009.8026192909. The cubic root of 64156938 is about 400.3266872826.

The spelling of 64156938 in words is "sixty-four million, one hundred fifty-six thousand, nine hundred thirty-eight".