265167564401 has 2 divisors, whose sum is σ = 265167564402. Its totient is φ = 265167564400.

The previous prime is 265167564383. The next prime is 265167564413. The reversal of 265167564401 is 104465761562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140343141376 + 124824423025 = 374624^2 + 353305^2 .

It is a cyclic number.

It is not a de Polignac number, because 265167564401 - 2¹⁴ = 265167548017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (265167564491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132583782200 + 132583782201.

It is an arithmetic number, because the mean of its divisors is an integer number (132583782201).

Almost surely, 2^265167564401 is an apocalyptic number.

It is an amenable number.

265167564401 is a deficient number, since it is larger than the sum of its proper divisors (1).

265167564401 is an equidigital number, since it uses as much as digits as its factorization.

265167564401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 265167564401 in words is "two hundred sixty-five billion, one hundred sixty-seven million, five hundred sixty-four thousand, four hundred one".