2746640647 has 4 divisors (see below), whose sum is σ = 2820874216. Its totient is φ = 2672407080.

The previous prime is 2746640639. The next prime is 2746640671. The reversal of 2746640647 is 7460466472.

2746640647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2746640647 - 2³ = 2746640639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2746640597 and 2746640606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2746640447) 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, 37116729 + ... + 37116802.

It is an arithmetic number, because the mean of its divisors is an integer number (705218554).

Almost surely, 2^2746640647 is an apocalyptic number.

2746640647 is a deficient number, since it is larger than the sum of its proper divisors (74233569).

2746640647 is an equidigital number, since it uses as much as digits as its factorization.

2746640647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74233568.

The product of its (nonzero) digits is 1354752, while the sum is 46.

The square root of 2746640647 is about 52408.4024465543. The cubic root of 2746640647 is about 1400.4489456446.

The spelling of 2746640647 in words is "two billion, seven hundred forty-six million, six hundred forty thousand, six hundred forty-seven".