18007790677 has 4 divisors (see below), whose sum is σ = 18009056736. Its totient is φ = 18006524620.

The previous prime is 18007790621. The next prime is 18007790693. The reversal of 18007790677 is 77609770081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18007790677 - 2¹¹ = 18007788629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18007790777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611449 + ... + 640222.

It is an arithmetic number, because the mean of its divisors is an integer number (4502264184).

Almost surely, 2^18007790677 is an apocalyptic number.

It is an amenable number.

18007790677 is a deficient number, since it is larger than the sum of its proper divisors (1266059).

18007790677 is a wasteful number, since it uses less digits than its factorization.

18007790677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266058.

The product of its (nonzero) digits is 1037232, while the sum is 52.

The spelling of 18007790677 in words is "eighteen billion, seven million, seven hundred ninety thousand, six hundred seventy-seven".