64739642 has 16 divisors (see below), whose sum is σ = 106283232. Its totient is φ = 29331120.

The previous prime is 64739627. The next prime is 64739657. The reversal of 64739642 is 24693746.

It is an interprime number because it is at equal distance from previous prime (64739627) and next prime (64739657).

It is a self number, because there is not a number n which added to its sum of digits gives 64739642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2333 + ... + 11615.

It is an arithmetic number, because the mean of its divisors is an integer number (6642702).

Almost surely, 2^64739642 is an apocalyptic number.

64739642 is a deficient number, since it is larger than the sum of its proper divisors (41543590).

64739642 is a wasteful number, since it uses less digits than its factorization.

64739642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613.

The product of its digits is 217728, while the sum is 41.

The square root of 64739642 is about 8046.0948291702. The cubic root of 64739642 is about 401.5350225623.

The spelling of 64739642 in words is "sixty-four million, seven hundred thirty-nine thousand, six hundred forty-two".