61140238908 has 96 divisors (see below), whose sum is σ = 164599185408. Its totient is φ = 17302118400.

The previous prime is 61140238891. The next prime is 61140238921. The reversal of 61140238908 is 80983204116.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 61140238908.

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 31 ways as a sum of consecutive naturals, for example, 6833718 + ... + 6842658.

It is an arithmetic number, because the mean of its divisors is an integer number (1714574848).

Almost surely, 2^61140238908 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 61140238908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82299592704).

61140238908 is an abundant number, since it is smaller than the sum of its proper divisors (103458946500).

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

61140238908 is a wasteful number, since it uses less digits than its factorization.

61140238908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723 (or 9721 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 61140238908 in words is "sixty-one billion, one hundred forty million, two hundred thirty-eight thousand, nine hundred eight".