79550659890 has 48 divisors (see below), whose sum is σ = 222741850968. Its totient is φ = 19581700608.

The previous prime is 79550659841. The next prime is 79550659907. The reversal of 79550659890 is 9895605597.

79550659890 is a `hidden beast` number, since 79 + 5 + 506 + 59 + 8 + 9 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 29556830241 + 49993829649 = 171921^2 + 223593^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33994839 + ... + 33997178.

Almost surely, 2^79550659890 is an apocalyptic number.

79550659890 is an abundant number, since it is smaller than the sum of its proper divisors (143191191078).

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

79550659890 is a wasteful number, since it uses less digits than its factorization.

79550659890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67992043 (or 67992040 counting only the distinct ones).

The product of its (nonzero) digits is 30618000, while the sum is 63.

The spelling of 79550659890 in words is "seventy-nine billion, five hundred fifty million, six hundred fifty-nine thousand, eight hundred ninety".