265640506356419 has 2 divisors, whose sum is σ = 265640506356420. Its totient is φ = 265640506356418.

The previous prime is 265640506356409. The next prime is 265640506356457. The reversal of 265640506356419 is 914653605046562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265640506356419 - 2⁸ = 265640506356163 is a prime.

It is a super-2 number, since 2×265640506356419² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (265640506356409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132820253178209 + 132820253178210.

It is an arithmetic number, because the mean of its divisors is an integer number (132820253178210).

Almost surely, 2^{265640506356419} is an apocalyptic number.

265640506356419 is a deficient number, since it is larger than the sum of its proper divisors (1).

265640506356419 is an equidigital number, since it uses as much as digits as its factorization.

265640506356419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968000, while the sum is 62.

The spelling of 265640506356419 in words is "two hundred sixty-five trillion, six hundred forty billion, five hundred six million, three hundred fifty-six thousand, four hundred nineteen".