18775595978 has 8 divisors (see below), whose sum is σ = 29645677920. Its totient is φ = 8893703340.

The previous prime is 18775595977. The next prime is 18775596013. The reversal of 18775595978 is 87959557781.

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

It is not an unprimeable number, because it can be changed into a prime (18775595977) 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, 247047278 + ... + 247047353.

It is an arithmetic number, because the mean of its divisors is an integer number (3705709740).

Almost surely, 2^18775595978 is an apocalyptic number.

18775595978 is a deficient number, since it is larger than the sum of its proper divisors (10870081942).

18775595978 is a wasteful number, since it uses less digits than its factorization.

18775595978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494094652.

The product of its digits is 222264000, while the sum is 71.

The spelling of 18775595978 in words is "eighteen billion, seven hundred seventy-five million, five hundred ninety-five thousand, nine hundred seventy-eight".