819479700945 has 80 divisors (see below), whose sum is σ = 1534123261440. Its totient is φ = 417709581696.

The previous prime is 819479700931. The next prime is 819479700961. The reversal of 819479700945 is 549007974918.

819479700945 is a `hidden beast` number, since 8 + 1 + 9 + 479 + 70 + 0 + 94 + 5 = 666.

It is not a de Polignac number, because 819479700945 - 2⁴ = 819479700929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11487096 + ... + 11558214.

It is an arithmetic number, because the mean of its divisors is an integer number (19176540768).

Almost surely, 2^819479700945 is an apocalyptic number.

It is an amenable number.

819479700945 is a deficient number, since it is larger than the sum of its proper divisors (714643560495).

819479700945 is a wasteful number, since it uses less digits than its factorization.

819479700945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72396 (or 72387 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 819479700945 in words is "eight hundred nineteen billion, four hundred seventy-nine million, seven hundred thousand, nine hundred forty-five".