7638505013 has 4 divisors (see below), whose sum is σ = 7655003328. Its totient is φ = 7622006700.

The previous prime is 7638504983. The next prime is 7638505027. The reversal of 7638505013 is 3105058367.

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: 3105058367 = 97 ⋅32010911.

It is a cyclic number.

It is not a de Polignac number, because 7638505013 - 2⁶ = 7638504949 is a prime.

It is a super-2 number, since 2×7638505013² (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 (7638505513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8248463 + ... + 8249388.

It is an arithmetic number, because the mean of its divisors is an integer number (1913750832).

Almost surely, 2^7638505013 is an apocalyptic number.

It is an amenable number.

7638505013 is a deficient number, since it is larger than the sum of its proper divisors (16498315).

7638505013 is a wasteful number, since it uses less digits than its factorization.

7638505013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16498314.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 7638505013 is about 87398.5412521285. The cubic root of 7638505013 is about 1969.4099268575.

The spelling of 7638505013 in words is "seven billion, six hundred thirty-eight million, five hundred five thousand, thirteen".