117900561789 has 12 divisors (see below), whose sum is σ = 170685243456. Its totient is φ = 78422944392.

The previous prime is 117900561787. The next prime is 117900561811. The reversal of 117900561789 is 987165009711.

117900561789 is a `hidden beast` number, since 1 + 1 + 7 + 9 + 0 + 0 + 561 + 78 + 9 = 666.

It is not a de Polignac number, because 117900561789 - 2¹ = 117900561787 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117900561787) 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, 14781637 + ... + 14789610.

It is an arithmetic number, because the mean of its divisors is an integer number (14223770288).

Almost surely, 2^117900561789 is an apocalyptic number.

It is an amenable number.

117900561789 is a deficient number, since it is larger than the sum of its proper divisors (52784681667).

117900561789 is a wasteful number, since it uses less digits than its factorization.

117900561789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29571696 (or 29571693 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 54.

The spelling of 117900561789 in words is "one hundred seventeen billion, nine hundred million, five hundred sixty-one thousand, seven hundred eighty-nine".