39840572642 has 16 divisors (see below), whose sum is σ = 64597107960. Its totient is φ = 18319596672.

The previous prime is 39840572627. The next prime is 39840572657. The reversal of 39840572642 is 24627504893.

39840572642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39840572627) and next prime (39840572657).

It can be written as a sum of positive squares in 4 ways, for example, as 18766534081 + 21074038561 = 136991^2 + 145169^2 .

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, 2841203 + ... + 2855190.

Almost surely, 2^39840572642 is an apocalyptic number.

39840572642 is a deficient number, since it is larger than the sum of its proper divisors (24756535318).

39840572642 is a wasteful number, since it uses less digits than its factorization.

39840572642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5696677.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 39840572642 in words is "thirty-nine billion, eight hundred forty million, five hundred seventy-two thousand, six hundred forty-two".