100775386631 has 4 divisors (see below), whose sum is σ = 100835769000. Its totient is φ = 100715004264.

The previous prime is 100775386609. The next prime is 100775386633. The reversal of 100775386631 is 136683577001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100775386631 is a prime.

It is a super-2 number, since 2×100775386631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100775386633) 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, 30188681 + ... + 30192018.

It is an arithmetic number, because the mean of its divisors is an integer number (25208942250).

Almost surely, 2^100775386631 is an apocalyptic number.

100775386631 is a deficient number, since it is larger than the sum of its proper divisors (60382369).

100775386631 is an equidigital number, since it uses as much as digits as its factorization.

100775386631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60382368.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 100775386631 in words is "one hundred billion, seven hundred seventy-five million, three hundred eighty-six thousand, six hundred thirty-one".