102509691640 has 32 divisors (see below), whose sum is σ = 230660530560. Its totient is φ = 41001436800.

The previous prime is 102509691629. The next prime is 102509691667. The reversal of 102509691640 is 46196905201.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702610 + ... + 835870.

It is an arithmetic number, because the mean of its divisors is an integer number (7208141580).

Almost surely, 2^102509691640 is an apocalyptic number.

102509691640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102509691640 is an abundant number, since it is smaller than the sum of its proper divisors (128150838920).

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

102509691640 is a wasteful number, since it uses less digits than its factorization.

102509691640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152503 (or 152499 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 102509691640 in words is "one hundred two billion, five hundred nine million, six hundred ninety-one thousand, six hundred forty".