100605437643 has 4 divisors (see below), whose sum is σ = 134140583528. Its totient is φ = 67070291760.

The previous prime is 100605437633. The next prime is 100605437651. The reversal of 100605437643 is 346734506001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100605437643 - 2²⁴ = 100588660427 is a prime.

It is a super-2 number, since 2×100605437643² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100605437633) 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, 16767572938 + ... + 16767572943.

It is an arithmetic number, because the mean of its divisors is an integer number (33535145882).

Almost surely, 2^100605437643 is an apocalyptic number.

100605437643 is a deficient number, since it is larger than the sum of its proper divisors (33535145885).

100605437643 is an equidigital number, since it uses as much as digits as its factorization.

100605437643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33535145884.

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 100605437643 in words is "one hundred billion, six hundred five million, four hundred thirty-seven thousand, six hundred forty-three".