7438645491 has 8 divisors (see below), whose sum is σ = 10129219584. Its totient is φ = 4853584200.

The previous prime is 7438645481. The next prime is 7438645519. The reversal of 7438645491 is 1945468347.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7438645491 - 2⁹ = 7438644979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7438645471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26378035 + ... + 26378316.

It is an arithmetic number, because the mean of its divisors is an integer number (1266152448).

Almost surely, 2^7438645491 is an apocalyptic number.

7438645491 is a deficient number, since it is larger than the sum of its proper divisors (2690574093).

7438645491 is a wasteful number, since it uses less digits than its factorization.

7438645491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52756401.

The product of its digits is 2903040, while the sum is 51.

The square root of 7438645491 is about 86247.5825226423. The cubic root of 7438645491 is about 1952.0815371570.

The spelling of 7438645491 in words is "seven billion, four hundred thirty-eight million, six hundred forty-five thousand, four hundred ninety-one".