39401332874821 has 4 divisors (see below), whose sum is σ = 39418092270144. Its totient is φ = 39384573479500.

The previous prime is 39401332874819. The next prime is 39401332874863. The reversal of 39401332874821 is 12847823310493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39401332874821 - 2¹ = 39401332874819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39401332874801) 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, 8379694135 + ... + 8379698836.

It is an arithmetic number, because the mean of its divisors is an integer number (9854523067536).

Almost surely, 2^{39401332874821} is an apocalyptic number.

It is an amenable number.

39401332874821 is a deficient number, since it is larger than the sum of its proper divisors (16759395323).

39401332874821 is a wasteful number, since it uses less digits than its factorization.

39401332874821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16759395322.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 39401332874821 in words is "thirty-nine trillion, four hundred one billion, three hundred thirty-two million, eight hundred seventy-four thousand, eight hundred twenty-one".