521827372266379 has 2 divisors, whose sum is σ = 521827372266380. Its totient is φ = 521827372266378.

The previous prime is 521827372266367. The next prime is 521827372266397. The reversal of 521827372266379 is 973662273728125.

Together with next prime (521827372266397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521827372266379 - 2³⁷ = 521689933312907 is a prime.

It is a super-2 number, since 2×521827372266379² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (521827372266349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260913686133189 + 260913686133190.

It is an arithmetic number, because the mean of its divisors is an integer number (260913686133190).

Almost surely, 2^{521827372266379} is an apocalyptic number.

521827372266379 is a deficient number, since it is larger than the sum of its proper divisors (1).

521827372266379 is an equidigital number, since it uses as much as digits as its factorization.

521827372266379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640120320, while the sum is 70.

The spelling of 521827372266379 in words is "five hundred twenty-one trillion, eight hundred twenty-seven billion, three hundred seventy-two million, two hundred sixty-six thousand, three hundred seventy-nine".