61110729192 has 128 divisors (see below), whose sum is σ = 170595331200. Its totient is φ = 18129051648.

The previous prime is 61110729179. The next prime is 61110729193. The reversal of 61110729192 is 29192701116.

It is a self number, because there is not a number n which added to its sum of digits gives 61110729192.

It is not an unprimeable number, because it can be changed into a prime (61110729193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4310788 + ... + 4324940.

It is an arithmetic number, because the mean of its divisors is an integer number (1332776025).

Almost surely, 2^61110729192 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 61110729192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85297665600).

61110729192 is an abundant number, since it is smaller than the sum of its proper divisors (109484602008).

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

61110729192 is a wasteful number, since it uses less digits than its factorization.

61110729192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14755 (or 14751 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 39.

The spelling of 61110729192 in words is "sixty-one billion, one hundred ten million, seven hundred twenty-nine thousand, one hundred ninety-two".