18640765280635 has 8 divisors (see below), whose sum is σ = 22369091070816. Its totient is φ = 14912497068480.

The previous prime is 18640765280629. The next prime is 18640765280653. The reversal of 18640765280635 is 53608256704681.

It is a happy number.

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

It is not a de Polignac number, because 18640765280635 - 2⁵ = 18640765280603 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13679026 + ... + 14979895.

It is an arithmetic number, because the mean of its divisors is an integer number (2796136383852).

Almost surely, 2^{18640765280635} is an apocalyptic number.

18640765280635 is a deficient number, since it is larger than the sum of its proper divisors (3728325790181).

18640765280635 is a wasteful number, since it uses less digits than its factorization.

18640765280635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28789013.

The product of its (nonzero) digits is 58060800, while the sum is 61.

The spelling of 18640765280635 in words is "eighteen trillion, six hundred forty billion, seven hundred sixty-five million, two hundred eighty thousand, six hundred thirty-five".