102640543664 has 10 divisors (see below), whose sum is σ = 198866053380. Its totient is φ = 51320271824.

The previous prime is 102640543661. The next prime is 102640543669. The reversal of 102640543664 is 466345046201.

It is not an unprimeable number, because it can be changed into a prime (102640543661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3207516974 + ... + 3207517005.

It is an arithmetic number, because the mean of its divisors is an integer number (19886605338).

Almost surely, 2^102640543664 is an apocalyptic number.

It is an amenable number.

102640543664 is a deficient number, since it is larger than the sum of its proper divisors (96225509716).

102640543664 is an equidigital number, since it uses as much as digits as its factorization.

102640543664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415033987 (or 6415033981 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 102640543664 its reverse (466345046201), we get a palindrome (568985589865).

The spelling of 102640543664 in words is "one hundred two billion, six hundred forty million, five hundred forty-three thousand, six hundred sixty-four".