61655247108 has 144 divisors (see below), whose sum is σ = 196277617536. Its totient is φ = 15882531840.

The previous prime is 61655247103. The next prime is 61655247169. The reversal of 61655247108 is 80174255616.

61655247108 is a `hidden beast` number, since 6 + 16 + 5 + 524 + 7 + 108 = 666.

It is not an unprimeable number, because it can be changed into a prime (61655247103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77973 + ... + 359708.

Almost surely, 2^61655247108 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 61655247108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98138808768).

61655247108 is an abundant number, since it is smaller than the sum of its proper divisors (134622370428).

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

61655247108 is a wasteful number, since it uses less digits than its factorization.

61655247108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437754 (or 437749 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 61655247108 in words is "sixty-one billion, six hundred fifty-five million, two hundred forty-seven thousand, one hundred eight".