1943117649 has 12 divisors (see below), whose sum is σ = 3061882512. Its totient is φ = 1177647000.

The previous prime is 1943117639. The next prime is 1943117699. The reversal of 1943117649 is 9467113491.

It is a happy number.

1943117649 is a `hidden beast` number, since 1 + 9 + 431 + 176 + 49 = 666.

It is not a de Polignac number, because 1943117649 - 2¹² = 1943113553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1943117609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9813627 + ... + 9813824.

It is an arithmetic number, because the mean of its divisors is an integer number (255156876).

Almost surely, 2^1943117649 is an apocalyptic number.

It is an amenable number.

1943117649 is a deficient number, since it is larger than the sum of its proper divisors (1118764863).

1943117649 is a wasteful number, since it uses less digits than its factorization.

1943117649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19627468 (or 19627465 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1943117649 is about 44080.8081709036. The cubic root of 1943117649 is about 1247.8614417949.

The spelling of 1943117649 in words is "one billion, nine hundred forty-three million, one hundred seventeen thousand, six hundred forty-nine".