61796988396 has 192 divisors, whose sum is σ = 189604316160. Its totient is φ = 17159109120.

The previous prime is 61796988359. The next prime is 61796988401. The reversal of 61796988396 is 69388969716.

61796988396 is a `hidden beast` number, since 6 + 179 + 69 + 8 + 8 + 396 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2101225 + ... + 2130431.

It is an arithmetic number, because the mean of its divisors is an integer number (987522480).

Almost surely, 2^61796988396 is an apocalyptic number.

61796988396 is a gapful number since it is divisible by the number (66) 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 61796988396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94802158080).

61796988396 is an abundant number, since it is smaller than the sum of its proper divisors (127807327764).

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

61796988396 is a wasteful number, since it uses less digits than its factorization.

61796988396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29381 (or 29373 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The spelling of 61796988396 in words is "sixty-one billion, seven hundred ninety-six million, nine hundred eighty-eight thousand, three hundred ninety-six".