264673198978 has 8 divisors (see below), whose sum is σ = 399538523772. Its totient is φ = 131493691056.

The previous prime is 264673198967. The next prime is 264673199029. The reversal of 264673198978 is 879891376462.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 264661889209 + 11309769 = 514453^2 + 3363^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421453825 + ... + 421454452.

Almost surely, 2^264673198978 is an apocalyptic number.

264673198978 is a deficient number, since it is larger than the sum of its proper divisors (134865324794).

264673198978 is a wasteful number, since it uses less digits than its factorization.

264673198978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842908436.

The product of its digits is 219469824, while the sum is 70.

The spelling of 264673198978 in words is "two hundred sixty-four billion, six hundred seventy-three million, one hundred ninety-eight thousand, nine hundred seventy-eight".