68891525 has 6 divisors (see below), whose sum is σ = 85425522. Its totient is φ = 55113200.

The previous prime is 68891503. The next prime is 68891567. The reversal of 68891525 is 52519886.

It can be written as a sum of positive squares in 3 ways, for example, as 217156 + 68674369 = 466^2 + 8287^2 .

It is a de Polignac number, because none of the positive numbers 2^k-68891525 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 5 ways as a sum of consecutive naturals, for example, 1377806 + ... + 1377855.

It is an arithmetic number, because the mean of its divisors is an integer number (14237587).

Almost surely, 2^68891525 is an apocalyptic number.

It is an amenable number.

68891525 is a deficient number, since it is larger than the sum of its proper divisors (16533997).

68891525 is a wasteful number, since it uses less digits than its factorization.

68891525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755671 (or 2755666 counting only the distinct ones).

The product of its digits is 172800, while the sum is 44.

The square root of 68891525 is about 8300.0918669615. The cubic root of 68891525 is about 409.9415443133.

The spelling of 68891525 in words is "sixty-eight million, eight hundred ninety-one thousand, five hundred twenty-five".