61511968485768 has 64 divisors (see below), whose sum is σ = 158742063659520. Its totient is φ = 19842383001600.

The previous prime is 61511968485727. The next prime is 61511968485827. The reversal of 61511968485768 is 86758486911516.

It is a self number, because there is not a number n which added to its sum of digits gives 61511968485768.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93595846 + ... + 94250762.

It is an arithmetic number, because the mean of its divisors is an integer number (2480344744680).

Almost surely, 2^{61511968485768} is an apocalyptic number.

It is an amenable number.

61511968485768 is an abundant number, since it is smaller than the sum of its proper divisors (97230095173752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61511968485768 is a wasteful number, since it uses less digits than its factorization.

61511968485768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781198 (or 781194 counting only the distinct ones).

The product of its digits is 696729600, while the sum is 75.

The spelling of 61511968485768 in words is "sixty-one trillion, five hundred eleven billion, nine hundred sixty-eight million, four hundred eighty-five thousand, seven hundred sixty-eight".