61550149936 has 40 divisors (see below), whose sum is σ = 130128439104. Its totient is φ = 27970071360.

The previous prime is 61550149919. The next prime is 61550149957. The reversal of 61550149936 is 63994105516.

It is a self number, because there is not a number n which added to its sum of digits gives 61550149936.

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, 665331 + ... + 752173.

Almost surely, 2^61550149936 is an apocalyptic number.

It is an amenable number.

61550149936 is an abundant number, since it is smaller than the sum of its proper divisors (68578289168).

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

61550149936 is a wasteful number, since it uses less digits than its factorization.

61550149936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90889 (or 90883 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 49.

The spelling of 61550149936 in words is "sixty-one billion, five hundred fifty million, one hundred forty-nine thousand, nine hundred thirty-six".