39854645893 has 4 divisors (see below), whose sum is σ = 41587456608. Its totient is φ = 38121835180.

The previous prime is 39854645863. The next prime is 39854645921.

39854645893 is nontrivially palindromic in base 10.

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 a de Polignac number, because none of the positive numbers 2^k-39854645893 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 (39854645813) 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, 866405323 + ... + 866405368.

It is an arithmetic number, because the mean of its divisors is an integer number (10396864152).

Almost surely, 2^39854645893 is an apocalyptic number.

It is an amenable number.

39854645893 is a deficient number, since it is larger than the sum of its proper divisors (1732810715).

39854645893 is a wasteful number, since it uses less digits than its factorization.

39854645893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732810714.

The product of its digits is 111974400, while the sum is 64.

The spelling of 39854645893 in words is "thirty-nine billion, eight hundred fifty-four million, six hundred forty-five thousand, eight hundred ninety-three".