856269769494 has 64 divisors (see below), whose sum is σ = 1744425227520. Its totient is φ = 280163051520.

The previous prime is 856269769493. The next prime is 856269769517. The reversal of 856269769494 is 494967962658.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856269769493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42779949 + ... + 42799959.

It is an arithmetic number, because the mean of its divisors is an integer number (27256644180).

Almost surely, 2^856269769494 is an apocalyptic number.

856269769494 is an abundant number, since it is smaller than the sum of its proper divisors (888155458026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856269769494 is a wasteful number, since it uses less digits than its factorization.

856269769494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20685.

The product of its digits is 1410877440, while the sum is 75.

The spelling of 856269769494 in words is "eight hundred fifty-six billion, two hundred sixty-nine million, seven hundred sixty-nine thousand, four hundred ninety-four".