61508908944 has 180 divisors, whose sum is σ = 200958026256. Its totient is φ = 17511306624.

The previous prime is 61508908927. The next prime is 61508908963. The reversal of 61508908944 is 44980980516.

61508908944 is a `hidden beast` number, since 6 + 1 + 508 + 90 + 8 + 9 + 44 = 666.

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 35 ways as a sum of consecutive naturals, for example, 1981447 + ... + 2012249.

Almost surely, 2^61508908944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61508908944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100479013128).

61508908944 is an abundant number, since it is smaller than the sum of its proper divisors (139449117312).

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

61508908944 is a wasteful number, since it uses less digits than its factorization.

61508908944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31114 (or 31098 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 61508908944 in words is "sixty-one billion, five hundred eight million, nine hundred eight thousand, nine hundred forty-four".