100373639491 has 4 divisors (see below), whose sum is σ = 100379544592. Its totient is φ = 100367734392.

The previous prime is 100373639477. The next prime is 100373639501. The reversal of 100373639491 is 194936373001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194936373001 = 4703 ⋅41449367.

It is a cyclic number.

It is not a de Polignac number, because 100373639491 - 2⁹ = 100373638979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100373639411) 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, 2926980 + ... + 2961073.

It is an arithmetic number, because the mean of its divisors is an integer number (25094886148).

Almost surely, 2^100373639491 is an apocalyptic number.

100373639491 is a deficient number, since it is larger than the sum of its proper divisors (5905101).

100373639491 is an equidigital number, since it uses as much as digits as its factorization.

100373639491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5905100.

The product of its (nonzero) digits is 367416, while the sum is 46.

The spelling of 100373639491 in words is "one hundred billion, three hundred seventy-three million, six hundred thirty-nine thousand, four hundred ninety-one".