7438770813 has 4 divisors (see below), whose sum is σ = 9918361088. Its totient is φ = 4959180540.

The previous prime is 7438770811. The next prime is 7438770817. The reversal of 7438770813 is 3180778347.

It is a happy number.

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.

It is not a de Polignac number, because 7438770813 - 2¹ = 7438770811 is a prime.

It is a super-2 number, since 2×7438770813² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7438770811) 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 3 ways as a sum of consecutive naturals, for example, 1239795133 + ... + 1239795138.

It is an arithmetic number, because the mean of its divisors is an integer number (2479590272).

Almost surely, 2^7438770813 is an apocalyptic number.

It is an amenable number.

7438770813 is a deficient number, since it is larger than the sum of its proper divisors (2479590275).

7438770813 is a wasteful number, since it uses less digits than its factorization.

7438770813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479590274.

The product of its (nonzero) digits is 790272, while the sum is 48.

The square root of 7438770813 is about 86248.3090442937. The cubic root of 7438770813 is about 1952.0924996093.

The spelling of 7438770813 in words is "seven billion, four hundred thirty-eight million, seven hundred seventy thousand, eight hundred thirteen".