7743948649 has 4 divisors (see below), whose sum is σ = 7746113536. Its totient is φ = 7741783764.

The previous prime is 7743948643. The next prime is 7743948671. The reversal of 7743948649 is 9468493477.

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 a cyclic number.

It is not a de Polignac number, because 7743948649 - 2¹⁹ = 7743424361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7743948643) 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, 1077069 + ... + 1084234.

It is an arithmetic number, because the mean of its divisors is an integer number (1936528384).

Almost surely, 2^7743948649 is an apocalyptic number.

It is an amenable number.

7743948649 is a deficient number, since it is larger than the sum of its proper divisors (2164887).

7743948649 is a wasteful number, since it uses less digits than its factorization.

7743948649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164886.

The product of its digits is 36578304, while the sum is 61.

The square root of 7743948649 is about 87999.7082324709. The cubic root of 7743948649 is about 1978.4306042434.

The spelling of 7743948649 in words is "seven billion, seven hundred forty-three million, nine hundred forty-eight thousand, six hundred forty-nine".