6434420731457 has 4 divisors (see below), whose sum is σ = 6452648552580. Its totient is φ = 6416192910336.

The previous prime is 6434420731423. The next prime is 6434420731517. The reversal of 6434420731457 is 7541370244346.

6434420731457 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 2536616²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2614119846976 + 3820300884481 = 1616824^2 + 1954559^2 .

It is a cyclic number.

It is not a de Polignac number, because 6434420731457 - 2¹⁰ = 6434420730433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6434420737457) 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, 9113910032 + ... + 9113910737.

It is an arithmetic number, because the mean of its divisors is an integer number (1613162138145).

Almost surely, 2^{6434420731457} is an apocalyptic number.

It is an amenable number.

6434420731457 is a deficient number, since it is larger than the sum of its proper divisors (18227821123).

6434420731457 is a wasteful number, since it uses less digits than its factorization.

6434420731457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18227821122.

The product of its (nonzero) digits is 6773760, while the sum is 50.

The spelling of 6434420731457 in words is "six trillion, four hundred thirty-four billion, four hundred twenty million, seven hundred thirty-one thousand, four hundred fifty-seven".