61901773488688 has 80 divisors (see below), whose sum is σ = 144691062750720. Its totient is φ = 25061852141568.

The previous prime is 61901773488671. The next prime is 61901773488733. The reversal of 61901773488688 is 88688437710916.

It is a super-2 number, since 2×61901773488688² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (76).

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, 40451620 + ... + 41953987.

It is an arithmetic number, because the mean of its divisors is an integer number (1808638284384).

Almost surely, 2^{61901773488688} is an apocalyptic number.

It is an amenable number.

61901773488688 is an abundant number, since it is smaller than the sum of its proper divisors (82789289262032).

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

61901773488688 is a wasteful number, since it uses less digits than its factorization.

61901773488688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82405994 (or 82405988 counting only the distinct ones).

The product of its (nonzero) digits is 780337152, while the sum is 76.

The spelling of 61901773488688 in words is "sixty-one trillion, nine hundred one billion, seven hundred seventy-three million, four hundred eighty-eight thousand, six hundred eighty-eight".