102140642665 has 16 divisors (see below), whose sum is σ = 124597538640. Its totient is φ = 80360421120.

The previous prime is 102140642657. The next prime is 102140642693. The reversal of 102140642665 is 566246041201.

It can be written as a sum of positive squares in 8 ways, for example, as 12228821056 + 89911821609 = 110584^2 + 299853^2 .

It is not a de Polignac number, because 102140642665 - 2³ = 102140642657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2258091 + ... + 2302879.

It is an arithmetic number, because the mean of its divisors is an integer number (7787346165).

Almost surely, 2^102140642665 is an apocalyptic number.

It is an amenable number.

102140642665 is a deficient number, since it is larger than the sum of its proper divisors (22456895975).

102140642665 is an equidigital number, since it uses as much as digits as its factorization.

102140642665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52332.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 102140642665 its reverse (566246041201), we get a palindrome (668386683866).

The spelling of 102140642665 in words is "one hundred two billion, one hundred forty million, six hundred forty-two thousand, six hundred sixty-five".