39155944421 has 8 divisors (see below), whose sum is σ = 43051920384. Its totient is φ = 35316025920.

The previous prime is 39155944417. The next prime is 39155944459. The reversal of 39155944421 is 12444955193.

39155944421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 39155944421 - 2² = 39155944417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39155944921) 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, 14012900 + ... + 14015693.

It is an arithmetic number, because the mean of its divisors is an integer number (5381490048).

Almost surely, 2^39155944421 is an apocalyptic number.

It is an amenable number.

39155944421 is a deficient number, since it is larger than the sum of its proper divisors (3895975963).

39155944421 is a wasteful number, since it uses less digits than its factorization.

39155944421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28028731.

The product of its digits is 777600, while the sum is 47.

The spelling of 39155944421 in words is "thirty-nine billion, one hundred fifty-five million, nine hundred forty-four thousand, four hundred twenty-one".