61604422121652 has 96 divisors (see below), whose sum is σ = 155223233383680. Its totient is φ = 18957630827520.

The previous prime is 61604422121647. The next prime is 61604422121663. The reversal of 61604422121652 is 25612122440616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20125752 + ... + 22983792.

It is an arithmetic number, because the mean of its divisors is an integer number (1616908681080).

Almost surely, 2^{61604422121652} 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 61604422121652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77611616691840).

61604422121652 is an abundant number, since it is smaller than the sum of its proper divisors (93618811262028).

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

61604422121652 is a wasteful number, since it uses less digits than its factorization.

61604422121652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860793 (or 2860791 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 61604422121652 in words is "sixty-one trillion, six hundred four billion, four hundred twenty-two million, one hundred twenty-one thousand, six hundred fifty-two".