39042909256721 has 8 divisors (see below), whose sum is σ = 40389449428800. Its totient is φ = 37696384615120.

The previous prime is 39042909256679. The next prime is 39042909256781. The reversal of 39042909256721 is 12765290924093.

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 39042909256721 - 2⁶ = 39042909256657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39042909256781) 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, 1351610 + ... + 8939388.

It is an arithmetic number, because the mean of its divisors is an integer number (5048681178600).

Almost surely, 2^{39042909256721} is an apocalyptic number.

It is an amenable number.

39042909256721 is a deficient number, since it is larger than the sum of its proper divisors (1346540172079).

39042909256721 is a wasteful number, since it uses less digits than its factorization.

39042909256721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7765239.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 39042909256721 in words is "thirty-nine trillion, forty-two billion, nine hundred nine million, two hundred fifty-six thousand, seven hundred twenty-one".