108912640013 has 4 divisors (see below), whose sum is σ = 108913331520. Its totient is φ = 108911948508.

The previous prime is 108912640007. The next prime is 108912640043. The reversal of 108912640013 is 310046219801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 310046219801 = 247601 ⋅1252201.

It is a cyclic number.

It is not a de Polignac number, because 108912640013 - 2⁶ = 108912639949 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 (108912640003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18206 + ... + 467072.

It is an arithmetic number, because the mean of its divisors is an integer number (27228332880).

Almost surely, 2^108912640013 is an apocalyptic number.

It is an amenable number.

108912640013 is a deficient number, since it is larger than the sum of its proper divisors (691507).

108912640013 is an equidigital number, since it uses as much as digits as its factorization.

108912640013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691506.

The product of its (nonzero) digits is 10368, while the sum is 35.

Adding to 108912640013 its reverse (310046219801), we get a palindrome (418958859814).

The spelling of 108912640013 in words is "one hundred eight billion, nine hundred twelve million, six hundred forty thousand, thirteen".