61305135924 has 12 divisors (see below), whose sum is σ = 143045317184. Its totient is φ = 20435045304.

The previous prime is 61305135923. The next prime is 61305135953. The reversal of 61305135924 is 42953150316.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61305135923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2554380652 + ... + 2554380675.

Almost surely, 2^61305135924 is an apocalyptic number.

It is an amenable number.

61305135924 is an abundant number, since it is smaller than the sum of its proper divisors (81740181260).

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

61305135924 is a wasteful number, since it uses less digits than its factorization.

61305135924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108761334 (or 5108761332 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 61305135924 in words is "sixty-one billion, three hundred five million, one hundred thirty-five thousand, nine hundred twenty-four".