11738662649 has 4 divisors (see below), whose sum is σ = 13415614464. Its totient is φ = 10061710836.

The previous prime is 11738662643. The next prime is 11738662681. The reversal of 11738662649 is 94626683711.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94626683711 = 7 ⋅13518097673.

It is a cyclic number.

It is not a de Polignac number, because 11738662649 - 2⁴ = 11738662633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11738662649.

It is not an unprimeable number, because it can be changed into a prime (11738662643) 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, 838475897 + ... + 838475910.

It is an arithmetic number, because the mean of its divisors is an integer number (3353903616).

Almost surely, 2^11738662649 is an apocalyptic number.

It is an amenable number.

11738662649 is a deficient number, since it is larger than the sum of its proper divisors (1676951815).

11738662649 is an equidigital number, since it uses as much as digits as its factorization.

11738662649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676951814.

The product of its digits is 2612736, while the sum is 53.

The spelling of 11738662649 in words is "eleven billion, seven hundred thirty-eight million, six hundred sixty-two thousand, six hundred forty-nine".