100249041861 has 6 divisors (see below), whose sum is σ = 144804171590. Its totient is φ = 66832694568.

The previous prime is 100249041857. The next prime is 100249041887. The reversal of 100249041861 is 168140942001.

100249041861 is a `hidden beast` number, since 100 + 2 + 490 + 4 + 1 + 8 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 98144984961 + 2104056900 = 313281^2 + 45870^2 .

It is not a de Polignac number, because 100249041861 - 2² = 100249041857 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 (100249041811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5569391206 + ... + 5569391223.

Almost surely, 2^100249041861 is an apocalyptic number.

It is an amenable number.

100249041861 is a deficient number, since it is larger than the sum of its proper divisors (44555129729).

100249041861 is a wasteful number, since it uses less digits than its factorization.

100249041861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11138782435 (or 11138782432 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

Adding to 100249041861 its reverse (168140942001), we get a palindrome (268389983862).

The spelling of 100249041861 in words is "one hundred billion, two hundred forty-nine million, forty-one thousand, eight hundred sixty-one".