61724073440780 has 24 divisors (see below), whose sum is σ = 132066225062352. Its totient is φ = 24223787312192.

The previous prime is 61724073440723. The next prime is 61724073440791. The reversal of 61724073440780 is 8704437042716.

It is a super-2 number, since 2×61724073440780² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29115127922 + ... + 29115130041.

It is an arithmetic number, because the mean of its divisors is an integer number (5502759377598).

Almost surely, 2^{61724073440780} is an apocalyptic number.

It is an amenable number.

61724073440780 is an abundant number, since it is smaller than the sum of its proper divisors (70342151621572).

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

61724073440780 is a wasteful number, since it uses less digits than its factorization.

61724073440780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58230258025 (or 58230258023 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 53.

The spelling of 61724073440780 in words is "sixty-one trillion, seven hundred twenty-four billion, seventy-three million, four hundred forty thousand, seven hundred eighty".