851018343425 has 6 divisors (see below), whose sum is σ = 1055262745878. Its totient is φ = 680814674720.

The previous prime is 851018343377. The next prime is 851018343449. The reversal of 851018343425 is 524343810158.

It can be written as a sum of positive squares in 3 ways, for example, as 113913675121 + 737104668304 = 337511^2 + 858548^2 .

It is not a de Polignac number, because 851018343425 - 2¹⁰ = 851018342401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17020366844 + ... + 17020366893.

It is an arithmetic number, because the mean of its divisors is an integer number (175877124313).

Almost surely, 2^851018343425 is an apocalyptic number.

It is an amenable number.

851018343425 is a deficient number, since it is larger than the sum of its proper divisors (204244402453).

851018343425 is a wasteful number, since it uses less digits than its factorization.

851018343425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34040733747 (or 34040733742 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 851018343425 in words is "eight hundred fifty-one billion, eighteen million, three hundred forty-three thousand, four hundred twenty-five".