815666976402 has 16 divisors (see below), whose sum is σ = 1634872643712. Its totient is φ = 271299210320.

The previous prime is 815666976401. The next prime is 815666976433. The reversal of 815666976402 is 204679666518.

It is not an unprimeable number, because it can be changed into a prime (815666976401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147442458 + ... + 147447989.

It is an arithmetic number, because the mean of its divisors is an integer number (102179540232).

Almost surely, 2^815666976402 is an apocalyptic number.

815666976402 is an abundant number, since it is smaller than the sum of its proper divisors (819205667310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

815666976402 is a wasteful number, since it uses less digits than its factorization.

815666976402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294890913.

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 815666976402 in words is "eight hundred fifteen billion, six hundred sixty-six million, nine hundred seventy-six thousand, four hundred two".