816431552940 has 48 divisors (see below), whose sum is σ = 2287153405152. Its totient is φ = 217606027776.

The previous prime is 816431552933. The next prime is 816431553011. The reversal of 816431552940 is 49255134618.

It is a self number, because there is not a number n which added to its sum of digits gives 816431552940.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3287089 + ... + 3526728.

It is an arithmetic number, because the mean of its divisors is an integer number (47649029274).

Almost surely, 2^816431552940 is an apocalyptic number.

It is an amenable number.

816431552940 is an abundant number, since it is smaller than the sum of its proper divisors (1470721852212).

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

816431552940 is a wasteful number, since it uses less digits than its factorization.

816431552940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815826 (or 6815824 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 816431552940 in words is "eight hundred sixteen billion, four hundred thirty-one million, five hundred fifty-two thousand, nine hundred forty".