39405440115 has 144 divisors (see below), whose sum is σ = 76093207008. Its totient is φ = 19547371008.

The previous prime is 39405440101. The next prime is 39405440119. The reversal of 39405440115 is 51104450493.

It is a happy number.

It is not a de Polignac number, because 39405440115 - 2¹⁰ = 39405439091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39405440115.

It is not an unprimeable number, because it can be changed into a prime (39405440119) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 23780367 + ... + 23782023.

Almost surely, 2^39405440115 is an apocalyptic number.

39405440115 is a deficient number, since it is larger than the sum of its proper divisors (36687766893).

39405440115 is a wasteful number, since it uses less digits than its factorization.

39405440115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 39405440115 in words is "thirty-nine billion, four hundred five million, four hundred forty thousand, one hundred fifteen".