1138866651 has 12 divisors (see below), whose sum is σ = 1771570528. Its totient is φ = 700840944.

The previous prime is 1138866637. The next prime is 1138866667. The reversal of 1138866651 is 1566688311.

It is not a de Polignac number, because 1138866651 - 2¹⁷ = 1138735579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1138866597 and 1138866606.

It is not an unprimeable number, because it can be changed into a prime (1138866611) 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, 4866835 + ... + 4867068.

Almost surely, 2^1138866651 is an apocalyptic number.

1138866651 is a deficient number, since it is larger than the sum of its proper divisors (632703877).

1138866651 is a wasteful number, since it uses less digits than its factorization.

1138866651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9733922 (or 9733919 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1138866651 is about 33747.0984086040. The cubic root of 1138866651 is about 1044.2976289530.

The spelling of 1138866651 in words is "one billion, one hundred thirty-eight million, eight hundred sixty-six thousand, six hundred fifty-one".