100419905881 has 3 divisors (see below), whose sum is σ = 100420222773. Its totient is φ = 100419588990.

The previous prime is 100419905869. The next prime is 100419905891. The reversal of 100419905881 is 188509914001.

The square root of 100419905881 is 316891.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 188509914001 = 63199 ⋅2982799.

It is not a de Polignac number, because 100419905881 - 2⁷ = 100419905753 is a prime.

It is a super-2 number, since 2×100419905881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100419905801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 158446 + ... + 475336.

It is an arithmetic number, because the mean of its divisors is an integer number (33473407591).

Almost surely, 2^100419905881 is an apocalyptic number.

100419905881 is the 316891-st square number.

100419905881 is the 158446-th centered octagonal number.

It is an amenable number.

100419905881 is a deficient number, since it is larger than the sum of its proper divisors (316892).

100419905881 is an frugal number, since it uses more digits than its factorization.

100419905881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633782 (or 316891 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 46.

The spelling of 100419905881 in words is "one hundred billion, four hundred nineteen million, nine hundred five thousand, eight hundred eighty-one".