61894996992 has 176 divisors, whose sum is σ = 194087041920. Its totient is φ = 19417890816.

The previous prime is 61894996937. The next prime is 61894997011. The reversal of 61894996992 is 29969949816.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 61894996992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404173 + ... + 535859.

Almost surely, 2^61894996992 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 61894996992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97043520960).

61894996992 is an abundant number, since it is smaller than the sum of its proper divisors (132192044928).

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

61894996992 is a wasteful number, since it uses less digits than its factorization.

61894996992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131733 (or 131709 counting only the distinct ones).

The product of its digits is 136048896, while the sum is 72.

The spelling of 61894996992 in words is "sixty-one billion, eight hundred ninety-four million, nine hundred ninety-six thousand, nine hundred ninety-two".