7638890047649 has 4 divisors (see below), whose sum is σ = 8730160054464. Its totient is φ = 6547620040836.

The previous prime is 7638890047643. The next prime is 7638890047703. The reversal of 7638890047649 is 9467400988367.

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 7638890047649 - 2³⁶ = 7570170570913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7638890047643) 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, 545635003397 + ... + 545635003410.

It is an arithmetic number, because the mean of its divisors is an integer number (2182540013616).

Almost surely, 2^{7638890047649} is an apocalyptic number.

It is an amenable number.

7638890047649 is a deficient number, since it is larger than the sum of its proper divisors (1091270006815).

7638890047649 is a wasteful number, since it uses less digits than its factorization.

7638890047649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091270006814.

The product of its (nonzero) digits is 438939648, while the sum is 71.

The spelling of 7638890047649 in words is "seven trillion, six hundred thirty-eight billion, eight hundred ninety million, forty-seven thousand, six hundred forty-nine".