61699121304 has 16 divisors (see below), whose sum is σ = 154247803320. Its totient is φ = 20566373760.

The previous prime is 61699121291. The next prime is 61699121311. The reversal of 61699121304 is 40312199616.

61699121304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285398337 + ... + 1285398384.

Almost surely, 2^61699121304 is an apocalyptic number.

It is an amenable number.

61699121304 is an abundant number, since it is smaller than the sum of its proper divisors (92548682016).

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

61699121304 is a wasteful number, since it uses less digits than its factorization.

61699121304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570796730 (or 2570796726 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 61699121304 in words is "sixty-one billion, six hundred ninety-nine million, one hundred twenty-one thousand, three hundred four".