61551852996716 has 24 divisors (see below), whose sum is σ = 109271181196800. Its totient is φ = 30331819602000.

The previous prime is 61551852996653. The next prime is 61551852996719. The reversal of 61551852996716 is 61769925815516.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a self number, because there is not a number n which added to its sum of digits gives 61551852996716.

It is not an unprimeable number, because it can be changed into a prime (61551852996719) 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, 37200116 + ... + 38819483.

It is an arithmetic number, because the mean of its divisors is an integer number (4552965883200).

Almost surely, 2^{61551852996716} is an apocalyptic number.

It is an amenable number.

61551852996716 is a deficient number, since it is larger than the sum of its proper divisors (47719328200084).

61551852996716 is a wasteful number, since it uses less digits than its factorization.

61551852996716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76022525 (or 76022523 counting only the distinct ones).

The product of its digits is 244944000, while the sum is 71.

The spelling of 61551852996716 in words is "sixty-one trillion, five hundred fifty-one billion, eight hundred fifty-two million, nine hundred ninety-six thousand, seven hundred sixteen".