7638655849499 has 4 divisors (see below), whose sum is σ = 7654213193880. Its totient is φ = 7623098505120.

The previous prime is 7638655849469. The next prime is 7638655849501. The reversal of 7638655849499 is 9949485568367.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7638655849499 - 2²⁸ = 7638387414043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7638655849469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7778671454 + ... + 7778672435.

It is an arithmetic number, because the mean of its divisors is an integer number (1913553298470).

Almost surely, 2^{7638655849499} is an apocalyptic number.

7638655849499 is a deficient number, since it is larger than the sum of its proper divisors (15557344381).

7638655849499 is a wasteful number, since it uses less digits than its factorization.

7638655849499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15557344380.

The product of its digits is 14108774400, while the sum is 83.

The spelling of 7638655849499 in words is "seven trillion, six hundred thirty-eight billion, six hundred fifty-five million, eight hundred forty-nine thousand, four hundred ninety-nine".