12392778089257 has 2 divisors, whose sum is σ = 12392778089258. Its totient is φ = 12392778089256.

The previous prime is 12392778089233. The next prime is 12392778089303. The reversal of 12392778089257 is 75298087729321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6759043233856 + 5633734855401 = 2599816^2 + 2373549^2 .

It is a cyclic number.

It is not a de Polignac number, because 12392778089257 - 2¹⁹ = 12392777564969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12392778029257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6196389044628 + 6196389044629.

It is an arithmetic number, because the mean of its divisors is an integer number (6196389044629).

Almost surely, 2^{12392778089257} is an apocalyptic number.

It is an amenable number.

12392778089257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12392778089257 is an equidigital number, since it uses as much as digits as its factorization.

12392778089257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 213373440, while the sum is 70.

The spelling of 12392778089257 in words is "twelve trillion, three hundred ninety-two billion, seven hundred seventy-eight million, eighty-nine thousand, two hundred fifty-seven".