64515542 has 32 divisors (see below), whose sum is σ = 120197952. Its totient is φ = 25288704.

The previous prime is 64515533. The next prime is 64515551. The reversal of 64515542 is 24551546.

It is an interprime number because it is at equal distance from previous prime (64515533) and next prime (64515551).

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 64515499 and 64515508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18998 + ... + 22134.

It is an arithmetic number, because the mean of its divisors is an integer number (3756186).

Almost surely, 2^64515542 is an apocalyptic number.

64515542 is a deficient number, since it is larger than the sum of its proper divisors (55682410).

64515542 is a wasteful number, since it uses less digits than its factorization.

64515542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272.

The product of its digits is 24000, while the sum is 32.

The square root of 64515542 is about 8032.1567464785. The cubic root of 64515542 is about 401.0711747345.

The spelling of 64515542 in words is "sixty-four million, five hundred fifteen thousand, five hundred forty-two".