39422640641 has 4 divisors (see below), whose sum is σ = 39438793284. Its totient is φ = 39406488000.

The previous prime is 39422640623. The next prime is 39422640659. The reversal of 39422640641 is 14604622493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (39422640623) and next prime (39422640659).

It can be written as a sum of positive squares in 2 ways, for example, as 8592548416 + 30830092225 = 92696^2 + 175585^2 .

It is a cyclic number.

It is not a de Polignac number, because 39422640641 - 2⁶ = 39422640577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39422642641) 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, 8072660 + ... + 8077541.

It is an arithmetic number, because the mean of its divisors is an integer number (9859698321).

Almost surely, 2^39422640641 is an apocalyptic number.

It is an amenable number.

39422640641 is a deficient number, since it is larger than the sum of its proper divisors (16152643).

39422640641 is a wasteful number, since it uses less digits than its factorization.

39422640641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16152642.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 39422640641 in words is "thirty-nine billion, four hundred twenty-two million, six hundred forty thousand, six hundred forty-one".