47765691918 has 48 divisors (see below), whose sum is σ = 118318112640. Its totient is φ = 13642591248.

The previous prime is 47765691871. The next prime is 47765691923. The reversal of 47765691918 is 81919656774.

47765691918 is a `hidden beast` number, since 47 + 7 + 6 + 569 + 19 + 18 = 666.

It is a super-2 number, since 2×47765691918² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305821 + ... + 434807.

It is an arithmetic number, because the mean of its divisors is an integer number (2464960680).

Almost surely, 2^47765691918 is an apocalyptic number.

47765691918 is an abundant number, since it is smaller than the sum of its proper divisors (70552420722).

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

47765691918 is a wasteful number, since it uses less digits than its factorization.

47765691918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131941 (or 131938 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The spelling of 47765691918 in words is "forty-seven billion, seven hundred sixty-five million, six hundred ninety-one thousand, nine hundred eighteen".