64536534 has 16 divisors (see below), whose sum is σ = 143414640. Its totient is φ = 21512160.

The previous prime is 64536523. The next prime is 64536553. The reversal of 64536534 is 43563546.

64536534 is a `hidden beast` number, since 645 + 3 + 6 + 5 + 3 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597507 + ... + 597614.

It is an arithmetic number, because the mean of its divisors is an integer number (8963415).

Almost surely, 2^64536534 is an apocalyptic number.

64536534 is an abundant number, since it is smaller than the sum of its proper divisors (78878106).

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

64536534 is a wasteful number, since it uses less digits than its factorization.

64536534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195132 (or 1195126 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 64536534 is about 8033.4633876056. The cubic root of 64536534 is about 401.1146700580.

The spelling of 64536534 in words is "sixty-four million, five hundred thirty-six thousand, five hundred thirty-four".