68256577 has 2 divisors, whose sum is σ = 68256578. Its totient is φ = 68256576.

The previous prime is 68256557. The next prime is 68256589. The reversal of 68256577 is 77565286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62346816 + 5909761 = 7896^2 + 2431^2 .

It is a cyclic number.

It is not a de Polignac number, because 68256577 - 2⁷ = 68256449 is a prime.

It is a super-4 number, since 4×68256577⁴ (a number of 32 digits) contains 4444 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68256557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34128288 + 34128289.

It is an arithmetic number, because the mean of its divisors is an integer number (34128289).

Almost surely, 2^68256577 is an apocalyptic number.

It is an amenable number.

68256577 is a deficient number, since it is larger than the sum of its proper divisors (1).

68256577 is an equidigital number, since it uses as much as digits as its factorization.

68256577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 46.

The square root of 68256577 is about 8261.7538694880. The cubic root of 68256577 is about 408.6782280378.

The spelling of 68256577 in words is "sixty-eight million, two hundred fifty-six thousand, five hundred seventy-seven".