64536537 has 12 divisors (see below), whose sum is σ = 93177744. Its totient is φ = 39714480.

The previous prime is 64536523. The next prime is 64536553. The reversal of 64536537 is 73563546.

It is not a de Polignac number, because 64536537 - 2¹⁴ = 64520153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 64536495 and 64536504.

It is not an unprimeable number, because it can be changed into a prime (64536557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63139 + ... + 64152.

It is an arithmetic number, because the mean of its divisors is an integer number (7764812).

Almost surely, 2^64536537 is an apocalyptic number.

It is an amenable number.

64536537 is a deficient number, since it is larger than the sum of its proper divisors (28641207).

64536537 is a wasteful number, since it uses less digits than its factorization.

64536537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127320 (or 127307 counting only the distinct ones).

The product of its digits is 226800, while the sum is 39.

The square root of 64536537 is about 8033.4635743246. The cubic root of 64536537 is about 401.1146762733.

The spelling of 64536537 in words is "sixty-four million, five hundred thirty-six thousand, five hundred thirty-seven".