64999942 has 32 divisors (see below), whose sum is σ = 120232512. Its totient is φ = 25718784.

The previous prime is 64999939. The next prime is 64999943. The reversal of 64999942 is 24999946.

It is a self number, because there is not a number n which added to its sum of digits gives 64999942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64999943) 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, 10038 + ... + 15190.

It is an arithmetic number, because the mean of its divisors is an integer number (3757266).

Almost surely, 2^64999942 is an apocalyptic number.

64999942 is a deficient number, since it is larger than the sum of its proper divisors (55232570).

64999942 is a wasteful number, since it uses less digits than its factorization.

64999942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5232.

The product of its digits is 1259712, while the sum is 52.

The square root of 64999942 is about 8062.2541512904. The cubic root of 64999942 is about 402.0724562681.

The spelling of 64999942 in words is "sixty-four million, nine hundred ninety-nine thousand, nine hundred forty-two".