64040156 has 24 divisors (see below), whose sum is σ = 118935936. Its totient is φ = 30067200.

The previous prime is 64040117. The next prime is 64040159. The reversal of 64040156 is 65104046.

It is a happy number.

It is a super-2 number, since 2×64040156² = 8202283161008672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64040159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40085 + ... + 41651.

It is an arithmetic number, because the mean of its divisors is an integer number (4955664).

Almost surely, 2^64040156 is an apocalyptic number.

It is an amenable number.

64040156 is a deficient number, since it is larger than the sum of its proper divisors (54895780).

64040156 is a wasteful number, since it uses less digits than its factorization.

64040156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189 (or 2187 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 64040156 is about 8002.5093564456. The cubic root of 64040156 is about 400.0836408426.

The spelling of 64040156 in words is "sixty-four million, forty thousand, one hundred fifty-six".