61264145269 has 2 divisors, whose sum is σ = 61264145270. Its totient is φ = 61264145268.

The previous prime is 61264145251. The next prime is 61264145279. The reversal of 61264145269 is 96254146216.

61264145269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50495932369 + 10768212900 = 224713^2 + 103770^2 .

It is a cyclic number.

It is not a de Polignac number, because 61264145269 - 2²¹ = 61262048117 is a prime.

It is a super-2 number, since 2×61264145269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61264145279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30632072634 + 30632072635.

It is an arithmetic number, because the mean of its divisors is an integer number (30632072635).

Almost surely, 2^61264145269 is an apocalyptic number.

It is an amenable number.

61264145269 is a deficient number, since it is larger than the sum of its proper divisors (1).

61264145269 is an equidigital number, since it uses as much as digits as its factorization.

61264145269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The spelling of 61264145269 in words is "sixty-one billion, two hundred sixty-four million, one hundred forty-five thousand, two hundred sixty-nine".