61139453112 has 48 divisors (see below), whose sum is σ = 167682060000. Its totient is φ = 20121843456.

The previous prime is 61139453099. The next prime is 61139453201. The reversal of 61139453112 is 21135493116.

61139453112 is a `hidden beast` number, since 6 + 113 + 9 + 4 + 531 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5368737 + ... + 5380112.

It is an arithmetic number, because the mean of its divisors is an integer number (3493376250).

Almost surely, 2^61139453112 is an apocalyptic number.

It is an amenable number.

61139453112 is an abundant number, since it is smaller than the sum of its proper divisors (106542606888).

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

61139453112 is a wasteful number, since it uses less digits than its factorization.

61139453112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10748940 (or 10748933 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The spelling of 61139453112 in words is "sixty-one billion, one hundred thirty-nine million, four hundred fifty-three thousand, one hundred twelve".