101981394879 has 32 divisors (see below), whose sum is σ = 168195148800. Its totient is φ = 53522042112.

The previous prime is 101981394821. The next prime is 101981394913. The reversal of 101981394879 is 978493189101.

It is not a de Polignac number, because 101981394879 - 2¹¹ = 101981392831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101981399879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 884262 + ... + 992915.

It is an arithmetic number, because the mean of its divisors is an integer number (5256098400).

Almost surely, 2^101981394879 is an apocalyptic number.

101981394879 is a deficient number, since it is larger than the sum of its proper divisors (66213753921).

101981394879 is a wasteful number, since it uses less digits than its factorization.

101981394879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877399.

The product of its (nonzero) digits is 3919104, while the sum is 60.

The spelling of 101981394879 in words is "one hundred one billion, nine hundred eighty-one million, three hundred ninety-four thousand, eight hundred seventy-nine".