100400840645 has 16 divisors (see below), whose sum is σ = 142134279168. Its totient is φ = 66625441920.

The previous prime is 100400840633. The next prime is 100400840647. The reversal of 100400840645 is 546048004001.

It is not a de Polignac number, because 100400840645 - 2⁶ = 100400840581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100400840647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46266584 + ... + 46268753.

It is an arithmetic number, because the mean of its divisors is an integer number (8883392448).

Almost surely, 2^100400840645 is an apocalyptic number.

It is an amenable number.

100400840645 is a deficient number, since it is larger than the sum of its proper divisors (41733438523).

100400840645 is an equidigital number, since it uses as much as digits as its factorization.

100400840645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92535380.

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 100400840645 its reverse (546048004001), we get a palindrome (646448844646).

The spelling of 100400840645 in words is "one hundred billion, four hundred million, eight hundred forty thousand, six hundred forty-five".