10316821640 has 16 divisors (see below), whose sum is σ = 23212848780. Its totient is φ = 4126728640.

The previous prime is 10316821633. The next prime is 10316821661. The reversal of 10316821640 is 4612861301.

It can be written as a sum of positive squares in 2 ways, for example, as 9819620836 + 497200804 = 99094^2 + 22298^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10316821597 and 10316821606.

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, 128960231 + ... + 128960310.

Almost surely, 2^10316821640 is an apocalyptic number.

10316821640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10316821640 is an abundant number, since it is smaller than the sum of its proper divisors (12896027140).

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

10316821640 is a wasteful number, since it uses less digits than its factorization.

10316821640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257920552 (or 257920548 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 10316821640 in words is "ten billion, three hundred sixteen million, eight hundred twenty-one thousand, six hundred forty".