61239955392 has 1120 divisors, whose sum is σ = 240757862400. Its totient is φ = 15240960000.

The previous prime is 61239955369. The next prime is 61239955471. The reversal of 61239955392 is 29355993216.

It is a happy number.

61239955392 is a `hidden beast` number, since 6 + 12 + 3 + 9 + 95 + 539 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 606336142 + ... + 606336242.

Almost surely, 2^61239955392 is an apocalyptic number.

61239955392 is a gapful number since it is divisible by the number (62) 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 61239955392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120378931200).

61239955392 is an abundant number, since it is smaller than the sum of its proper divisors (179517907008).

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

61239955392 is a wasteful number, since it uses less digits than its factorization.

61239955392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 155 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 54.

The spelling of 61239955392 in words is "sixty-one billion, two hundred thirty-nine million, nine hundred fifty-five thousand, three hundred ninety-two".