855973974395 has 4 divisors (see below), whose sum is σ = 1027168769280. Its totient is φ = 684779179512.

The previous prime is 855973974329. The next prime is 855973974397. The reversal of 855973974395 is 593479379558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 855973974395 - 2⁸ = 855973974139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (855973974397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85597397435 + ... + 85597397444.

It is an arithmetic number, because the mean of its divisors is an integer number (256792192320).

Almost surely, 2^855973974395 is an apocalyptic number.

855973974395 is a deficient number, since it is larger than the sum of its proper divisors (171194794885).

855973974395 is a wasteful number, since it uses less digits than its factorization.

855973974395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171194794884.

The product of its digits is 1285956000, while the sum is 74.

The spelling of 855973974395 in words is "eight hundred fifty-five billion, nine hundred seventy-three million, nine hundred seventy-four thousand, three hundred ninety-five".