39579878881 has 4 divisors (see below), whose sum is σ = 39690129600. Its totient is φ = 39469628164.

The previous prime is 39579878837. The next prime is 39579878903. The reversal of 39579878881 is 18887897593.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18887897593 = 68729 ⋅274817.

It is a cyclic number.

It is not a de Polignac number, because 39579878881 - 2²¹ = 39577781729 is a prime.

It is a super-2 number, since 2×39579878881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39579878801) 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, 55124821 + ... + 55125538.

It is an arithmetic number, because the mean of its divisors is an integer number (9922532400).

Almost surely, 2^39579878881 is an apocalyptic number.

It is an amenable number.

39579878881 is a deficient number, since it is larger than the sum of its proper divisors (110250719).

39579878881 is a wasteful number, since it uses less digits than its factorization.

39579878881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110250718.

The product of its digits is 243855360, while the sum is 73.

The spelling of 39579878881 in words is "thirty-nine billion, five hundred seventy-nine million, eight hundred seventy-eight thousand, eight hundred eighty-one".