102640206395 has 8 divisors (see below), whose sum is σ = 123647503104. Its totient is φ = 81792661504.

The previous prime is 102640206391. The next prime is 102640206437. The reversal of 102640206395 is 593602046201.

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

It is a cyclic number.

It is not a de Polignac number, because 102640206395 - 2² = 102640206391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102640206391) 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, 39936539 + ... + 39939108.

It is an arithmetic number, because the mean of its divisors is an integer number (15455937888).

Almost surely, 2^102640206395 is an apocalyptic number.

102640206395 is a deficient number, since it is larger than the sum of its proper divisors (21007296709).

102640206395 is an equidigital number, since it uses as much as digits as its factorization.

102640206395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79875909.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 102640206395 in words is "one hundred two billion, six hundred forty million, two hundred six thousand, three hundred ninety-five".