6468729749 has 4 divisors (see below), whose sum is σ = 6546666336. Its totient is φ = 6390793164.

The previous prime is 6468729739. The next prime is 6468729781. The reversal of 6468729749 is 9479278646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9479278646 = 2 ⋅4739639323.

It is a de Polignac number, because none of the positive numbers 2^k-6468729749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6468729691 and 6468729700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6468729719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38968169 + ... + 38968334.

It is an arithmetic number, because the mean of its divisors is an integer number (1636666584).

Almost surely, 2^6468729749 is an apocalyptic number.

It is an amenable number.

6468729749 is a deficient number, since it is larger than the sum of its proper divisors (77936587).

6468729749 is an equidigital number, since it uses as much as digits as its factorization.

6468729749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77936586.

The product of its digits is 36578304, while the sum is 62.

The square root of 6468729749 is about 80428.4138162627. The cubic root of 6468729749 is about 1863.2580340609.

The spelling of 6468729749 in words is "six billion, four hundred sixty-eight million, seven hundred twenty-nine thousand, seven hundred forty-nine".