39981266242 has 16 divisors (see below), whose sum is σ = 61110676152. Its totient is φ = 19611130240.

The previous prime is 39981266201. The next prime is 39981266257. The reversal of 39981266242 is 24266218993.

It can be written as a sum of positive squares in 4 ways, for example, as 26146566601 + 13834699641 = 161699^2 + 117621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39981266242.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183368 + ... + 1216684.

Almost surely, 2^39981266242 is an apocalyptic number.

39981266242 is a deficient number, since it is larger than the sum of its proper divisors (21129409910).

39981266242 is a wasteful number, since it uses less digits than its factorization.

39981266242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44693.

The product of its digits is 2239488, while the sum is 52.

The spelling of 39981266242 in words is "thirty-nine billion, nine hundred eighty-one million, two hundred sixty-six thousand, two hundred forty-two".