61616015516 has 12 divisors (see below), whose sum is σ = 117630575160. Its totient is φ = 28007279760.

The previous prime is 61616015497. The next prime is 61616015519. The reversal of 61616015516 is 61551061616.

It is a self number, because there is not a number n which added to its sum of digits gives 61616015516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616015519) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 700181951 + ... + 700182038.

It is an arithmetic number, because the mean of its divisors is an integer number (9802547930).

Almost surely, 2^61616015516 is an apocalyptic number.

It is an amenable number.

61616015516 is a deficient number, since it is larger than the sum of its proper divisors (56014559644).

61616015516 is a wasteful number, since it uses less digits than its factorization.

61616015516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400364004 (or 1400364002 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 61616015516 in words is "sixty-one billion, six hundred sixteen million, fifteen thousand, five hundred sixteen".