855940763645 has 16 divisors (see below), whose sum is σ = 1186416289728. Its totient is φ = 585884586240.

The previous prime is 855940763633. The next prime is 855940763647. The reversal of 855940763645 is 546367049558.

It is not a de Polignac number, because 855940763645 - 2⁶ = 855940763581 is a prime.

It is a super-3 number, since 3×855940763645³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855940763647) 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 15 ways as a sum of consecutive naturals, for example, 457721399 + ... + 457723268.

It is an arithmetic number, because the mean of its divisors is an integer number (74151018108).

Almost surely, 2^855940763645 is an apocalyptic number.

855940763645 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

855940763645 is a deficient number, since it is larger than the sum of its proper divisors (330475526083).

855940763645 is a wasteful number, since it uses less digits than its factorization.

855940763645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915444700.

The product of its (nonzero) digits is 108864000, while the sum is 62.

The spelling of 855940763645 in words is "eight hundred fifty-five billion, nine hundred forty million, seven hundred sixty-three thousand, six hundred forty-five".