1425631016261 has 2 divisors, whose sum is σ = 1425631016262. Its totient is φ = 1425631016260.

The previous prime is 1425631016189. The next prime is 1425631016273. The reversal of 1425631016261 is 1626101365241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 818780668225 + 606850348036 = 904865^2 + 779006^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425631016261 - 2¹⁸ = 1425630754117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1425631036261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712815508130 + 712815508131.

It is an arithmetic number, because the mean of its divisors is an integer number (712815508131).

Almost surely, 2^{1425631016261} is an apocalyptic number.

It is an amenable number.

1425631016261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425631016261 is an equidigital number, since it uses as much as digits as its factorization.

1425631016261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1425631016261 in words is "one trillion, four hundred twenty-five billion, six hundred thirty-one million, sixteen thousand, two hundred sixty-one".