61745807904 has 48 divisors (see below), whose sum is σ = 176817543840. Its totient is φ = 18710850560.

The previous prime is 61745807891. The next prime is 61745807911. The reversal of 61745807904 is 40970854716.

It is a tau number, because it is divible by the number of its divisors (48).

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, 29234649 + ... + 29236760.

It is an arithmetic number, because the mean of its divisors is an integer number (3683698830).

Almost surely, 2^61745807904 is an apocalyptic number.

It is an amenable number.

61745807904 is an abundant number, since it is smaller than the sum of its proper divisors (115071735936).

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

61745807904 is a wasteful number, since it uses less digits than its factorization.

61745807904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58471433 (or 58471425 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 61745807904 in words is "sixty-one billion, seven hundred forty-five million, eight hundred seven thousand, nine hundred four".