851953426685 has 4 divisors (see below), whose sum is σ = 1022344112028. Its totient is φ = 681562741344.

The previous prime is 851953426673. The next prime is 851953426697. The reversal of 851953426685 is 586624359158.

It is a happy number.

851953426685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (851953426673) and next prime (851953426697).

It can be written as a sum of positive squares in 2 ways, for example, as 301861237561 + 550092189124 = 549419^2 + 741682^2 .

It is a cyclic number.

It is not a de Polignac number, because 851953426685 - 2⁴ = 851953426669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85195342664 + ... + 85195342673.

It is an arithmetic number, because the mean of its divisors is an integer number (255586028007).

Almost surely, 2^851953426685 is an apocalyptic number.

It is an amenable number.

851953426685 is a deficient number, since it is larger than the sum of its proper divisors (170390685343).

851953426685 is a wasteful number, since it uses less digits than its factorization.

851953426685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170390685342.

The product of its digits is 62208000, while the sum is 62.

The spelling of 851953426685 in words is "eight hundred fifty-one billion, nine hundred fifty-three million, four hundred twenty-six thousand, six hundred eighty-five".