61760345136 has 120 divisors (see below), whose sum is σ = 185023229184. Its totient is φ = 17386467840.

The previous prime is 61760345123. The next prime is 61760345161. The reversal of 61760345136 is 63154306716.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38383500 + ... + 38385108.

Almost surely, 2^61760345136 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 61760345136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92511614592).

61760345136 is an abundant number, since it is smaller than the sum of its proper divisors (123262884048).

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

61760345136 is an equidigital number, since it uses as much as digits as its factorization.

61760345136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307 (or 1692 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 61760345136 in words is "sixty-one billion, seven hundred sixty million, three hundred forty-five thousand, one hundred thirty-six".