65942599438 has 4 divisors (see below), whose sum is σ = 98913899160. Its totient is φ = 32971299718.

The previous prime is 65942599433. The next prime is 65942599447. The reversal of 65942599438 is 83499524956.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 65942599438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65942599433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16485649858 + ... + 16485649861.

It is an arithmetic number, because the mean of its divisors is an integer number (24728474790).

Almost surely, 2^65942599438 is an apocalyptic number.

65942599438 is a deficient number, since it is larger than the sum of its proper divisors (32971299722).

65942599438 is a wasteful number, since it uses less digits than its factorization.

65942599438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32971299721.

The product of its digits is 83980800, while the sum is 64.

The spelling of 65942599438 in words is "sixty-five billion, nine hundred forty-two million, five hundred ninety-nine thousand, four hundred thirty-eight".