102640322893 has 8 divisors (see below), whose sum is σ = 103455461880. Its totient is φ = 101828375040.

The previous prime is 102640322881. The next prime is 102640322903. The reversal of 102640322893 is 398223046201.

It can be written as a sum of positive squares in 4 ways, for example, as 16217258409 + 86423064484 = 127347^2 + 293978^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102640322893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102640322803) 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, 733180 + ... + 861877.

It is an arithmetic number, because the mean of its divisors is an integer number (12931932735).

Almost surely, 2^102640322893 is an apocalyptic number.

It is an amenable number.

102640322893 is a deficient number, since it is larger than the sum of its proper divisors (815138987).

102640322893 is a wasteful number, since it uses less digits than its factorization.

102640322893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595567.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 102640322893 in words is "one hundred two billion, six hundred forty million, three hundred twenty-two thousand, eight hundred ninety-three".