854297215525 has 24 divisors (see below), whose sum is σ = 1140863870664. Its totient is φ = 630838809600.

The previous prime is 854297215507. The next prime is 854297215529. The reversal of 854297215525 is 525512792458.

It is a Cunningham number, because it is equal to 924282²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 154795820481 + 699501395044 = 393441^2 + 836362^2 .

It is not a de Polignac number, because 854297215525 - 2⁵ = 854297215493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (854297215529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10894257 + ... + 10972393.

It is an arithmetic number, because the mean of its divisors is an integer number (47535994611).

Almost surely, 2^854297215525 is an apocalyptic number.

It is an amenable number.

854297215525 is a deficient number, since it is larger than the sum of its proper divisors (286566655139).

854297215525 is a wasteful number, since it uses less digits than its factorization.

854297215525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111801 (or 111796 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 55.

The spelling of 854297215525 in words is "eight hundred fifty-four billion, two hundred ninety-seven million, two hundred fifteen thousand, five hundred twenty-five".