71254457652857 has 2 divisors, whose sum is σ = 71254457652858. Its totient is φ = 71254457652856.

The previous prime is 71254457652853. The next prime is 71254457652863. The reversal of 71254457652857 is 75825675445217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68689684229776 + 2564773423081 = 8287924^2 + 1601491^2 .

It is a cyclic number.

It is not a de Polignac number, because 71254457652857 - 2² = 71254457652853 is a prime.

It is not a weakly prime, because it can be changed into another prime (71254457652853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35627228826428 + 35627228826429.

It is an arithmetic number, because the mean of its divisors is an integer number (35627228826429).

Almost surely, 2^{71254457652857} is an apocalyptic number.

It is an amenable number.

71254457652857 is a deficient number, since it is larger than the sum of its proper divisors (1).

71254457652857 is an equidigital number, since it uses as much as digits as its factorization.

71254457652857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 658560000, while the sum is 68.

The spelling of 71254457652857 in words is "seventy-one trillion, two hundred fifty-four billion, four hundred fifty-seven million, six hundred fifty-two thousand, eight hundred fifty-seven".