100726782631 has 4 divisors (see below), whose sum is σ = 103069265992. Its totient is φ = 98384299272.

The previous prime is 100726782593. The next prime is 100726782661. The reversal of 100726782631 is 136287627001.

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

It is a cyclic number.

It is not a de Polignac number, because 100726782631 - 2⁷ = 100726782503 is a prime.

It is a super-2 number, since 2×100726782631² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 2342483317 = 100726782631 / (1 + 0 + 0 + 7 + 2 + 6 + 7 + 8 + 2 + 6 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100726782661) 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, 1171241616 + ... + 1171241701.

It is an arithmetic number, because the mean of its divisors is an integer number (25767316498).

Almost surely, 2^100726782631 is an apocalyptic number.

100726782631 is a deficient number, since it is larger than the sum of its proper divisors (2342483361).

100726782631 is an equidigital number, since it uses as much as digits as its factorization.

100726782631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342483360.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 100726782631 in words is "one hundred billion, seven hundred twenty-six million, seven hundred eighty-two thousand, six hundred thirty-one".