6438358451 has 4 divisors (see below), whose sum is σ = 7358123952. Its totient is φ = 5518592952.

The previous prime is 6438358441. The next prime is 6438358477. The reversal of 6438358451 is 1548538346.

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

It is a cyclic number.

It is not a de Polignac number, because 6438358451 - 2¹⁰ = 6438357427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6438358396 and 6438358405.

It is not an unprimeable number, because it can be changed into a prime (6438358441) 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, 459882740 + ... + 459882753.

It is an arithmetic number, because the mean of its divisors is an integer number (1839530988).

Almost surely, 2^6438358451 is an apocalyptic number.

6438358451 is a deficient number, since it is larger than the sum of its proper divisors (919765501).

6438358451 is an equidigital number, since it uses as much as digits as its factorization.

6438358451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919765500.

The product of its digits is 1382400, while the sum is 47.

The square root of 6438358451 is about 80239.3821698547. The cubic root of 6438358451 is about 1860.3374008304.

The spelling of 6438358451 in words is "six billion, four hundred thirty-eight million, three hundred fifty-eight thousand, four hundred fifty-one".