61864738510984 has 32 divisors (see below), whose sum is σ = 128159688481920. Its totient is φ = 27847043420416.

The previous prime is 61864738510973. The next prime is 61864738511021. The reversal of 61864738510984 is 48901583746816.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9888861724 + ... + 9888867979.

It is an arithmetic number, because the mean of its divisors is an integer number (4004990265060).

Almost surely, 2^{61864738510984} is an apocalyptic number.

It is an amenable number.

61864738510984 is an abundant number, since it is smaller than the sum of its proper divisors (66294949970936).

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

61864738510984 is a wasteful number, since it uses less digits than its factorization.

61864738510984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19777729749 (or 19777729745 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 70.

The spelling of 61864738510984 in words is "sixty-one trillion, eight hundred sixty-four billion, seven hundred thirty-eight million, five hundred ten thousand, nine hundred eighty-four".