18738491760761 has 8 divisors (see below), whose sum is σ = 18762538152960. Its totient is φ = 18714454001568.

The previous prime is 18738491760749. The next prime is 18738491760763. The reversal of 18738491760761 is 16706719483781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18738491760761 is a prime.

It is a super-2 number, since 2×18738491760761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18738491760691 and 18738491760700.

It is not an unprimeable number, because it can be changed into a prime (18738491760763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2191280 + ... + 6502206.

It is an arithmetic number, because the mean of its divisors is an integer number (2345317269120).

Almost surely, 2^{18738491760761} is an apocalyptic number.

It is an amenable number.

18738491760761 is a deficient number, since it is larger than the sum of its proper divisors (24046392199).

18738491760761 is an equidigital number, since it uses as much as digits as its factorization.

18738491760761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316503.

The product of its (nonzero) digits is 85349376, while the sum is 68.

The spelling of 18738491760761 in words is "eighteen trillion, seven hundred thirty-eight billion, four hundred ninety-one million, seven hundred sixty thousand, seven hundred sixty-one".