7638137497 has 2 divisors, whose sum is σ = 7638137498. Its totient is φ = 7638137496.

The previous prime is 7638137473. The next prime is 7638137531. The reversal of 7638137497 is 7947318367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5749278976 + 1888858521 = 75824^2 + 43461^2 .

It is a cyclic number.

It is not a de Polignac number, because 7638137497 - 2⁷ = 7638137369 is a prime.

It is a super-2 number, since 2×7638137497² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7638137467) 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 as a sum of consecutive naturals, namely, 3819068748 + 3819068749.

It is an arithmetic number, because the mean of its divisors is an integer number (3819068749).

Almost surely, 2^7638137497 is an apocalyptic number.

It is an amenable number.

7638137497 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638137497 is an equidigital number, since it uses as much as digits as its factorization.

7638137497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 55.

The square root of 7638137497 is about 87396.4386974664. The cubic root of 7638137497 is about 1969.3783412150.

The spelling of 7638137497 in words is "seven billion, six hundred thirty-eight million, one hundred thirty-seven thousand, four hundred ninety-seven".