61113739896 has 192 divisors, whose sum is σ = 190787425920. Its totient is φ = 18169557120.

The previous prime is 61113739879. The next prime is 61113739901. The reversal of 61113739896 is 69893731116.

It is a happy number.

61113739896 is a `hidden beast` number, since 611 + 13 + 7 + 3 + 9 + 8 + 9 + 6 = 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 (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1106391 + ... + 1160313.

It is an arithmetic number, because the mean of its divisors is an integer number (993684510).

Almost surely, 2^61113739896 is an apocalyptic number.

61113739896 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 61113739896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95393712960).

61113739896 is an abundant number, since it is smaller than the sum of its proper divisors (129673686024).

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

61113739896 is a wasteful number, since it uses less digits than its factorization.

61113739896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54008 (or 53992 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The spelling of 61113739896 in words is "sixty-one billion, one hundred thirteen million, seven hundred thirty-nine thousand, eight hundred ninety-six".