64001156 has 6 divisors (see below), whose sum is σ = 112002030. Its totient is φ = 32000576.

The previous prime is 64001137. The next prime is 64001159. The reversal of 64001156 is 65110046.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 1156 = 8000^2 + 34^2 .

It is a super-2 number, since 2×64001156² = 8192295938672672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64001159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000141 + ... + 8000148.

It is an arithmetic number, because the mean of its divisors is an integer number (18667005).

Almost surely, 2^64001156 is an apocalyptic number.

It is an amenable number.

64001156 is a deficient number, since it is larger than the sum of its proper divisors (48000874).

64001156 is a wasteful number, since it uses less digits than its factorization.

64001156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16000293 (or 16000291 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 64001156 is about 8000.0722496737. The cubic root of 64001156 is about 400.0024083188.

It can be divided in two parts, 6400 and 1156, that multiplied together give a square (7398400 = 2720²).

The spelling of 64001156 in words is "sixty-four million, one thousand, one hundred fifty-six".