61979559934 has 16 divisors (see below), whose sum is σ = 93428186400. Its totient is φ = 30837111264.

The previous prime is 61979559931. The next prime is 61979559947. The reversal of 61979559934 is 43995597916.

It is a super-2 number, since 2×61979559934² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61979559934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61979559931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376519 + ... + 515485.

It is an arithmetic number, because the mean of its divisors is an integer number (5839261650).

Almost surely, 2^61979559934 is an apocalyptic number.

61979559934 is a deficient number, since it is larger than the sum of its proper divisors (31448626466).

61979559934 is a wasteful number, since it uses less digits than its factorization.

61979559934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140067.

The product of its digits is 82668600, while the sum is 67.

The spelling of 61979559934 in words is "sixty-one billion, nine hundred seventy-nine million, five hundred fifty-nine thousand, nine hundred thirty-four".