64256252012431 has 16 divisors (see below), whose sum is σ = 71001557157888. Its totient is φ = 57841000624000.

The previous prime is 64256252012423. The next prime is 64256252012503. The reversal of 64256252012431 is 13421025265246.

It is a cyclic number.

It is not a de Polignac number, because 64256252012431 - 2³ = 64256252012423 is a prime.

It is a super-2 number, since 2×64256252012431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64256252012231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4868755 + ... + 12337636.

It is an arithmetic number, because the mean of its divisors is an integer number (4437597322368).

Almost surely, 2^{64256252012431} is an apocalyptic number.

64256252012431 is a deficient number, since it is larger than the sum of its proper divisors (6745305145457).

64256252012431 is a wasteful number, since it uses less digits than its factorization.

64256252012431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17215982.

The product of its (nonzero) digits is 691200, while the sum is 43.

Adding to 64256252012431 its reverse (13421025265246), we get a palindrome (77677277277677).

The spelling of 64256252012431 in words is "sixty-four trillion, two hundred fifty-six billion, two hundred fifty-two million, twelve thousand, four hundred thirty-one".