805425992856 has 40 divisors (see below), whose sum is σ = 2255938546620. Its totient is φ = 268475330736.

The previous prime is 805425992837. The next prime is 805425992897. The reversal of 805425992856 is 658299524508.

805425992856 is a `hidden beast` number, since 8 + 0 + 542 + 5 + 9 + 9 + 2 + 85 + 6 = 666.

It is a super-2 number, since 2×805425992856² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 805425992793 and 805425992802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 621470026 + ... + 621471321.

Almost surely, 2^805425992856 is an apocalyptic number.

It is an amenable number.

805425992856 is an abundant number, since it is smaller than the sum of its proper divisors (1450512553764).

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

805425992856 is a wasteful number, since it uses less digits than its factorization.

805425992856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242941365 (or 1242941352 counting only the distinct ones).

The product of its (nonzero) digits is 62208000, while the sum is 63.

It can be divided in two parts, 805425 and 992856, that added together give a square (1798281 = 1341²).

The spelling of 805425992856 in words is "eight hundred five billion, four hundred twenty-five million, nine hundred ninety-two thousand, eight hundred fifty-six".