102640310406 has 40 divisors (see below), whose sum is σ = 243519174360. Its totient is φ = 32200880832.

The previous prime is 102640310369. The next prime is 102640310407. The reversal of 102640310406 is 604013046201.

102640310406 is a `hidden beast` number, since 1 + 0 + 2 + 640 + 3 + 10 + 4 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 102640310406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102640310407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18632016 + ... + 18637523.

It is an arithmetic number, because the mean of its divisors is an integer number (6087979359).

Almost surely, 2^102640310406 is an apocalyptic number.

102640310406 is an abundant number, since it is smaller than the sum of its proper divisors (140878863954).

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

102640310406 is a wasteful number, since it uses less digits than its factorization.

102640310406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37269570 (or 37269561 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 102640310406 its reverse (604013046201), we get a palindrome (706653356607).

The spelling of 102640310406 in words is "one hundred two billion, six hundred forty million, three hundred ten thousand, four hundred six".