61551512004 has 24 divisors (see below), whose sum is σ = 144584092800. Its totient is φ = 20379470944.

The previous prime is 61551511993. The next prime is 61551512021. The reversal of 61551512004 is 40021515516.

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, 17210604 + ... + 17214179.

It is an arithmetic number, because the mean of its divisors is an integer number (6024337200).

Almost surely, 2^61551512004 is an apocalyptic number.

It is an amenable number.

61551512004 is an abundant number, since it is smaller than the sum of its proper divisors (83032580796).

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

61551512004 is a wasteful number, since it uses less digits than its factorization.

61551512004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34424939 (or 34424937 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 61551512004 in words is "sixty-one billion, five hundred fifty-one million, five hundred twelve thousand, four".