39642361729 has 8 divisors (see below), whose sum is σ = 41738721440. Its totient is φ = 37546994016.

The previous prime is 39642361673. The next prime is 39642361741. The reversal of 39642361729 is 92716324693.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39642361729 - 2¹¹ = 39642359681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39642361799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165252 + ... + 326485.

It is an arithmetic number, because the mean of its divisors is an integer number (5217340180).

Almost surely, 2^39642361729 is an apocalyptic number.

It is an amenable number.

39642361729 is a deficient number, since it is larger than the sum of its proper divisors (2096359711).

39642361729 is a wasteful number, since it uses less digits than its factorization.

39642361729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495999.

The product of its digits is 2939328, while the sum is 52.

The spelling of 39642361729 in words is "thirty-nine billion, six hundred forty-two million, three hundred sixty-one thousand, seven hundred twenty-nine".