61264145251 has 2 divisors, whose sum is σ = 61264145252. Its totient is φ = 61264145250.

The previous prime is 61264145231. The next prime is 61264145269. The reversal of 61264145251 is 15254146216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61264145251 - 2¹¹ = 61264143203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61264145251.

It is not a weakly prime, because it can be changed into another prime (61264145231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30632072625 + 30632072626.

It is an arithmetic number, because the mean of its divisors is an integer number (30632072626).

Almost surely, 2^61264145251 is an apocalyptic number.

61264145251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61264145251 is an equidigital number, since it uses as much as digits as its factorization.

61264145251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

The spelling of 61264145251 in words is "sixty-one billion, two hundred sixty-four million, one hundred forty-five thousand, two hundred fifty-one".