85369720525 has 6 divisors (see below), whose sum is σ = 105858453482. Its totient is φ = 68295776400.

The previous prime is 85369720523. The next prime is 85369720531. The reversal of 85369720525 is 52502796358.

It can be written as a sum of positive squares in 3 ways, for example, as 1535150761 + 83834569764 = 39181^2 + 289542^2 .

It is not a de Polignac number, because 85369720525 - 2¹ = 85369720523 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 (85369720523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1707394386 + ... + 1707394435.

Almost surely, 2^85369720525 is an apocalyptic number.

It is an amenable number.

85369720525 is a deficient number, since it is larger than the sum of its proper divisors (20488732957).

85369720525 is a wasteful number, since it uses less digits than its factorization.

85369720525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414788831 (or 3414788826 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 85369720525 in words is "eighty-five billion, three hundred sixty-nine million, seven hundred twenty thousand, five hundred twenty-five".