6425996729 has 2 divisors, whose sum is σ = 6425996730. Its totient is φ = 6425996728.

The previous prime is 6425996699. The next prime is 6425996737. The reversal of 6425996729 is 9276995246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4747210000 + 1678786729 = 68900^2 + 40973^2 .

It is a cyclic number.

It is not a de Polignac number, because 6425996729 - 2¹² = 6425992633 is a prime.

It is a super-2 number, since 2×6425996729² = 82586867922237398882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6425996029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212998364 + 3212998365.

It is an arithmetic number, because the mean of its divisors is an integer number (3212998365).

Almost surely, 2^6425996729 is an apocalyptic number.

It is an amenable number.

6425996729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6425996729 is an equidigital number, since it uses as much as digits as its factorization.

6425996729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 59.

The square root of 6425996729 is about 80162.3148929720. The cubic root of 6425996729 is about 1859.1460149711.

The spelling of 6425996729 in words is "six billion, four hundred twenty-five million, nine hundred ninety-six thousand, seven hundred twenty-nine".