100378508861 has 8 divisors (see below), whose sum is σ = 102772237920. Its totient is φ = 97987477392.

The previous prime is 100378508849. The next prime is 100378508911. The reversal of 100378508861 is 168805873001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100378508861 - 2³⁴ = 83198639677 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 (100378508801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598991 + ... + 748028.

It is an arithmetic number, because the mean of its divisors is an integer number (12846529740).

Almost surely, 2^100378508861 is an apocalyptic number.

It is an amenable number.

100378508861 is a deficient number, since it is larger than the sum of its proper divisors (2393729059).

100378508861 is a wasteful number, since it uses less digits than its factorization.

100378508861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348795.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 100378508861 in words is "one hundred billion, three hundred seventy-eight million, five hundred eight thousand, eight hundred sixty-one".