100004091772861 has 2 divisors, whose sum is σ = 100004091772862. Its totient is φ = 100004091772860.

The previous prime is 100004091772853. The next prime is 100004091772873. The reversal of 100004091772861 is 168277190400001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95745853170361 + 4258238602500 = 9784981^2 + 2063550^2 .

It is a cyclic number.

It is not a de Polignac number, because 100004091772861 - 2³ = 100004091772853 is a prime.

It is a super-2 number, since 2×100004091772861² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100004091772801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50002045886430 + 50002045886431.

It is an arithmetic number, because the mean of its divisors is an integer number (50002045886431).

Almost surely, 2^{100004091772861} is an apocalyptic number.

It is an amenable number.

100004091772861 is a deficient number, since it is larger than the sum of its proper divisors (1).

100004091772861 is an equidigital number, since it uses as much as digits as its factorization.

100004091772861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 100004091772861 in words is "one hundred trillion, four billion, ninety-one million, seven hundred seventy-two thousand, eight hundred sixty-one".