7738807474639 has 2 divisors, whose sum is σ = 7738807474640. Its totient is φ = 7738807474638.

The previous prime is 7738807474613. The next prime is 7738807474691. The reversal of 7738807474639 is 9364747088377.

It is a weak prime.

It is an emirp because it is prime and its reverse (9364747088377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7738807474639 - 2¹³ = 7738807466447 is a prime.

It is a super-2 number, since 2×7738807474639² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7738807471639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3869403737319 + 3869403737320.

It is an arithmetic number, because the mean of its divisors is an integer number (3869403737320).

Almost surely, 2^{7738807474639} is an apocalyptic number.

7738807474639 is a deficient number, since it is larger than the sum of its proper divisors (1).

7738807474639 is an equidigital number, since it uses as much as digits as its factorization.

7738807474639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1194891264, while the sum is 73.

The spelling of 7738807474639 in words is "seven trillion, seven hundred thirty-eight billion, eight hundred seven million, four hundred seventy-four thousand, six hundred thirty-nine".