61907099904 has 1008 divisors, whose sum is σ = 225196473600. Its totient is φ = 16769286144.

The previous prime is 61907099879. The next prime is 61907099927. The reversal of 61907099904 is 40999070916.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 783634137 + ... + 783634215.

It is an arithmetic number, because the mean of its divisors is an integer number (223409200).

Almost surely, 2^61907099904 is an apocalyptic number.

61907099904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61907099904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112598236800).

61907099904 is an abundant number, since it is smaller than the sum of its proper divisors (163289373696).

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

61907099904 is a wasteful number, since it uses less digits than its factorization.

61907099904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The spelling of 61907099904 in words is "sixty-one billion, nine hundred seven million, ninety-nine thousand, nine hundred four".