67857645025 has 27 divisors (see below), whose sum is σ = 85848380569. Its totient is φ = 53207666720.

The previous prime is 67857644983. The next prime is 67857645041. The reversal of 67857645025 is 52054675876.

It is a happy number.

The square root of 67857645025 is 260495.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 511166881 + 67346478144 = 22609^2 + 259512^2 .

It is not a de Polignac number, because 67857645025 - 2³⁵ = 33497906657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 69030684 + ... + 69031666.

Almost surely, 2^67857645025 is an apocalyptic number.

67857645025 is the 260495-th square number.

67857645025 is the 130248-th centered octagonal number.

It is an amenable number.

67857645025 is a deficient number, since it is larger than the sum of its proper divisors (17990735544).

67857645025 is an frugal number, since it uses more digits than its factorization.

67857645025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082 (or 1041 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 55.

The spelling of 67857645025 in words is "sixty-seven billion, eight hundred fifty-seven million, six hundred forty-five thousand, twenty-five".