18071767764 has 30 divisors (see below), whose sum is σ = 47243171514. Its totient is φ = 6023922480.

The previous prime is 18071767717. The next prime is 18071767789. The reversal of 18071767764 is 46776717081.

It can be written as a sum of positive squares in only one way, i.e., 16305246864 + 1766520900 = 127692^2 + 42030^2 .

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 Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 18071767764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27888207 + ... + 27888854.

Almost surely, 2^18071767764 is an apocalyptic number.

It is an amenable number.

18071767764 is an abundant number, since it is smaller than the sum of its proper divisors (29171403750).

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

18071767764 is a wasteful number, since it uses less digits than its factorization.

18071767764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55777077 (or 55777066 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 54.

The spelling of 18071767764 in words is "eighteen billion, seventy-one million, seven hundred sixty-seven thousand, seven hundred sixty-four".