4278257426381 has 2 divisors, whose sum is σ = 4278257426382. Its totient is φ = 4278257426380.

The previous prime is 4278257426371. The next prime is 4278257426413. The reversal of 4278257426381 is 1836247528724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3854900292100 + 423357134281 = 1963390^2 + 650659^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278257426381 - 2³⁴ = 4261077557197 is a prime.

It is a super-2 number, since 2×4278257426381² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4278257426381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4278257426371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139128713190 + 2139128713191.

It is an arithmetic number, because the mean of its divisors is an integer number (2139128713191).

Almost surely, 2^{4278257426381} is an apocalyptic number.

It is an amenable number.

4278257426381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278257426381 is an equidigital number, since it uses as much as digits as its factorization.

4278257426381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36126720, while the sum is 59.

The spelling of 4278257426381 in words is "four trillion, two hundred seventy-eight billion, two hundred fifty-seven million, four hundred twenty-six thousand, three hundred eighty-one".