100508095661 has 4 divisors (see below), whose sum is σ = 100513609500. Its totient is φ = 100502581824.

The previous prime is 100508095643. The next prime is 100508095693. The reversal of 100508095661 is 166590805001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48035488900 + 52472606761 = 219170^2 + 229069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100508095661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100508095631) 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, 2729486 + ... + 2766063.

It is an arithmetic number, because the mean of its divisors is an integer number (25128402375).

Almost surely, 2^100508095661 is an apocalyptic number.

It is an amenable number.

100508095661 is a deficient number, since it is larger than the sum of its proper divisors (5513839).

100508095661 is an equidigital number, since it uses as much as digits as its factorization.

100508095661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5513838.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 100508095661 in words is "one hundred billion, five hundred eight million, ninety-five thousand, six hundred sixty-one".