61990370559 has 12 divisors (see below), whose sum is σ = 96429465496. Its totient is φ = 38147920272.

The previous prime is 61990370483. The next prime is 61990370587. The reversal of 61990370559 is 95507309916.

61990370559 is a `hidden beast` number, since 6 + 19 + 9 + 0 + 3 + 70 + 559 = 666.

It is not a de Polignac number, because 61990370559 - 2⁹ = 61990370047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61990371559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264915997 + ... + 264916230.

Almost surely, 2^61990370559 is an apocalyptic number.

61990370559 is a deficient number, since it is larger than the sum of its proper divisors (34439094937).

61990370559 is a wasteful number, since it uses less digits than its factorization.

61990370559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529832246 (or 529832243 counting only the distinct ones).

The product of its (nonzero) digits is 2296350, while the sum is 54.

The spelling of 61990370559 in words is "sixty-one billion, nine hundred ninety million, three hundred seventy thousand, five hundred fifty-nine".