64537956 has 72 divisors (see below), whose sum is σ = 190444800. Its totient is φ = 18043776.

The previous prime is 64537943. The next prime is 64537981. The reversal of 64537956 is 65973546.

64537956 is a `hidden beast` number, since 64 + 537 + 9 + 56 = 666.

64537956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9120 + ... + 14568.

Almost surely, 2^64537956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64537956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95222400).

64537956 is an abundant number, since it is smaller than the sum of its proper divisors (125906844).

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

64537956 is a wasteful number, since it uses less digits than its factorization.

64537956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5513 (or 5508 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 64537956 is about 8033.5518919093. The cubic root of 64537956 is about 401.1176160940.

The spelling of 64537956 in words is "sixty-four million, five hundred thirty-seven thousand, nine hundred fifty-six".