6264145781 has 2 divisors, whose sum is σ = 6264145782. Its totient is φ = 6264145780.

The previous prime is 6264145757. The next prime is 6264145799. The reversal of 6264145781 is 1875414626.

6264145781 is digitally balanced in base 3, 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., 6261556900 + 2588881 = 79130^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 6264145781 - 2⁶ = 6264145717 is a prime.

It is a super-2 number, since 2×6264145781² = 78479044731240199922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6264145751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3132072890 + 3132072891.

It is an arithmetic number, because the mean of its divisors is an integer number (3132072891).

Almost surely, 2^6264145781 is an apocalyptic number.

It is an amenable number.

6264145781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6264145781 is an equidigital number, since it uses as much as digits as its factorization.

6264145781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 6264145781 is about 79146.3567133699. The cubic root of 6264145781 is about 1843.4043956013.

The spelling of 6264145781 in words is "six billion, two hundred sixty-four million, one hundred forty-five thousand, seven hundred eighty-one".