61291773984 has 96 divisors (see below), whose sum is σ = 188845001856. Its totient is φ = 17038632960.

The previous prime is 61291773967. The next prime is 61291774067. The reversal of 61291773984 is 48937719216.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1207677 + ... + 1257404.

It is an arithmetic number, because the mean of its divisors is an integer number (1967135436).

Almost surely, 2^61291773984 is an apocalyptic number.

It is an amenable number.

61291773984 is an abundant number, since it is smaller than the sum of its proper divisors (127553227872).

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

61291773984 is a wasteful number, since it uses less digits than its factorization.

61291773984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465138 (or 2465130 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The spelling of 61291773984 in words is "sixty-one billion, two hundred ninety-one million, seven hundred seventy-three thousand, nine hundred eighty-four".