61392918384 has 400 divisors, whose sum is σ = 208858560768. Its totient is φ = 17045489664.

The previous prime is 61392918343. The next prime is 61392918443. The reversal of 61392918384 is 48381929316.

61392918384 is a `hidden beast` number, since 613 + 9 + 2 + 9 + 18 + 3 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 61392918384.

It is a congruent number.

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 79 ways as a sum of consecutive naturals, for example, 131462119 + ... + 131462585.

Almost surely, 2^61392918384 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 61392918384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104429280384).

61392918384 is an abundant number, since it is smaller than the sum of its proper divisors (147465642384).

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

61392918384 is a wasteful number, since it uses less digits than its factorization.

61392918384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 859 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 61392918384 in words is "sixty-one billion, three hundred ninety-two million, nine hundred eighteen thousand, three hundred eighty-four".