61630646770 has 32 divisors (see below), whose sum is σ = 138308777856. Its totient is φ = 19209552000.

The previous prime is 61630646767. The next prime is 61630646801. The reversal of 61630646770 is 7764603616.

It is a super-2 number, since 2×61630646770² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61630646770.

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 15 ways as a sum of consecutive naturals, for example, 40019131 + ... + 40020670.

It is an arithmetic number, because the mean of its divisors is an integer number (4322149308).

Almost surely, 2^61630646770 is an apocalyptic number.

61630646770 is an abundant number, since it is smaller than the sum of its proper divisors (76678131086).

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

61630646770 is a wasteful number, since it uses less digits than its factorization.

61630646770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80039826.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 61630646770 in words is "sixty-one billion, six hundred thirty million, six hundred forty-six thousand, seven hundred seventy".