18480191651 has 2 divisors, whose sum is σ = 18480191652. Its totient is φ = 18480191650.

The previous prime is 18480191627. The next prime is 18480191659. The reversal of 18480191651 is 15619108481.

It is a strong prime.

It is an emirp because it is prime and its reverse (15619108481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18480191651 is a prime.

It is not a weakly prime, because it can be changed into another prime (18480191659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9240095825 + 9240095826.

It is an arithmetic number, because the mean of its divisors is an integer number (9240095826).

Almost surely, 2^18480191651 is an apocalyptic number.

18480191651 is a deficient number, since it is larger than the sum of its proper divisors (1).

18480191651 is an equidigital number, since it uses as much as digits as its factorization.

18480191651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 44.

The spelling of 18480191651 in words is "eighteen billion, four hundred eighty million, one hundred ninety-one thousand, six hundred fifty-one".