100645888522 has 4 divisors (see below), whose sum is σ = 150968832786. Its totient is φ = 50322944260.

The previous prime is 100645888517. The next prime is 100645888523. The reversal of 100645888522 is 225888546001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225888546001 = 83 ⋅2721548747.

It can be written as a sum of positive squares in only one way, i.e., 97650625081 + 2995263441 = 312491^2 + 54729^2 .

It is not an unprimeable number, because it can be changed into a prime (100645888523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25161472129 + ... + 25161472132.

Almost surely, 2^100645888522 is an apocalyptic number.

100645888522 is a deficient number, since it is larger than the sum of its proper divisors (50322944264).

100645888522 is an equidigital number, since it uses as much as digits as its factorization.

100645888522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50322944263.

The product of its (nonzero) digits is 1228800, while the sum is 49.

The spelling of 100645888522 in words is "one hundred billion, six hundred forty-five million, eight hundred eighty-eight thousand, five hundred twenty-two".