61508380509 has 16 divisors (see below), whose sum is σ = 93062327040. Its totient is φ = 40133126880.

The previous prime is 61508380501. The next prime is 61508380541. The reversal of 61508380509 is 90508380516.

61508380509 is a `hidden beast` number, since 61 + 5 + 0 + 8 + 3 + 80 + 509 = 666.

It is not a de Polignac number, because 61508380509 - 2³ = 61508380501 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61508380501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24233712 + ... + 24236249.

It is an arithmetic number, because the mean of its divisors is an integer number (5816395440).

Almost surely, 2^61508380509 is an apocalyptic number.

It is an amenable number.

61508380509 is a deficient number, since it is larger than the sum of its proper divisors (31553946531).

61508380509 is a wasteful number, since it uses less digits than its factorization.

61508380509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48470017 (or 48470011 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 61508380509 in words is "sixty-one billion, five hundred eight million, three hundred eighty thousand, five hundred nine".