64155992 has 16 divisors (see below), whose sum is σ = 120472800. Its totient is φ = 32029920.

The previous prime is 64155991. The next prime is 64156003. The reversal of 64155992 is 29955146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64155991) 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, 17 + ... + 11327.

It is an arithmetic number, because the mean of its divisors is an integer number (7529550).

Almost surely, 2^64155992 is an apocalyptic number.

It is an amenable number.

64155992 is a deficient number, since it is larger than the sum of its proper divisors (56316808).

64155992 is a wasteful number, since it uses less digits than its factorization.

64155992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12026 (or 12022 counting only the distinct ones).

The product of its digits is 97200, while the sum is 41.

The square root of 64155992 is about 8009.7435664321. The cubic root of 64155992 is about 400.3247196549.

The spelling of 64155992 in words is "sixty-four million, one hundred fifty-five thousand, nine hundred ninety-two".