102640473687 has 8 divisors (see below), whose sum is σ = 136897826800. Its totient is φ = 68405051520.

The previous prime is 102640473671. The next prime is 102640473697. The reversal of 102640473687 is 786374046201.

It is a happy number.

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

It is not a de Polignac number, because 102640473687 - 2⁴ = 102640473671 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 (102640473697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5471812 + ... + 5490537.

It is an arithmetic number, because the mean of its divisors is an integer number (17112228350).

Almost surely, 2^102640473687 is an apocalyptic number.

102640473687 is a deficient number, since it is larger than the sum of its proper divisors (34257353113).

102640473687 is a wasteful number, since it uses less digits than its factorization.

102640473687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10965473.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 102640473687 in words is "one hundred two billion, six hundred forty million, four hundred seventy-three thousand, six hundred eighty-seven".