61509203364 has 24 divisors (see below), whose sum is σ = 164024542528. Its totient is φ = 17574058080.

The previous prime is 61509203359. The next prime is 61509203383. The reversal of 61509203364 is 46330290516.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366126127 + ... + 366126294.

Almost surely, 2^61509203364 is an apocalyptic number.

It is an amenable number.

61509203364 is an abundant number, since it is smaller than the sum of its proper divisors (102515339164).

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

61509203364 is a wasteful number, since it uses less digits than its factorization.

61509203364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732252435 (or 732252433 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 61509203364 in words is "sixty-one billion, five hundred nine million, two hundred three thousand, three hundred sixty-four".