64137543 has 16 divisors (see below), whose sum is σ = 89779200. Its totient is φ = 40674240.

The previous prime is 64137533. The next prime is 64137551. The reversal of 64137543 is 34573146.

It is not a de Polignac number, because 64137543 - 2⁴ = 64137527 is a prime.

It is a super-2 number, since 2×64137543² = 8227248844153698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64137533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358 + ... + 11331.

It is an arithmetic number, because the mean of its divisors is an integer number (5611200).

Almost surely, 2^64137543 is an apocalyptic number.

64137543 is a deficient number, since it is larger than the sum of its proper divisors (25641657).

64137543 is a wasteful number, since it uses less digits than its factorization.

64137543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11782.

The product of its digits is 30240, while the sum is 33.

The square root of 64137543 is about 8008.5918237853. The cubic root of 64137543 is about 400.2863428871.

The spelling of 64137543 in words is "sixty-four million, one hundred thirty-seven thousand, five hundred forty-three".