68207157225 has 81 divisors (see below), whose sum is σ = 127878054213. Its totient is φ = 34749570240.

The previous prime is 68207157167. The next prime is 68207157233. The reversal of 68207157225 is 52275170286.

The square root of 68207157225 is 261165.

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

68207157225 is a `hidden beast` number, since 6 + 8 + 2 + 0 + 71 + 572 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 36036009 + 68171121216 = 6003^2 + 261096^2 .

It is not a de Polignac number, because 68207157225 - 2¹⁹ = 68206632937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 90101547 + ... + 90102303.

Almost surely, 2^68207157225 is an apocalyptic number.

68207157225 is the 261165-th square number.

68207157225 is the 130583-rd centered octagonal number.

It is an amenable number.

68207157225 is a deficient number, since it is larger than the sum of its proper divisors (59670896988).

68207157225 is an equidigital number, since it uses as much as digits as its factorization.

68207157225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 68207157225 in words is "sixty-eight billion, two hundred seven million, one hundred fifty-seven thousand, two hundred twenty-five".