1140646631 has 4 divisors (see below), whose sum is σ = 1151940264. Its totient is φ = 1129353000.

The previous prime is 1140646621. The next prime is 1140646651. The reversal of 1140646631 is 1366460411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1140646631 is a prime.

It is a super-2 number, since 2×1140646631² = 2602149473623300322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140646621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5646665 + ... + 5646866.

It is an arithmetic number, because the mean of its divisors is an integer number (287985066).

Almost surely, 2^1140646631 is an apocalyptic number.

1140646631 is a deficient number, since it is larger than the sum of its proper divisors (11293633).

1140646631 is a wasteful number, since it uses less digits than its factorization.

1140646631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11293632.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1140646631 is about 33773.4604534389. The cubic root of 1140646631 is about 1044.8414038599.

The spelling of 1140646631 in words is "one billion, one hundred forty million, six hundred forty-six thousand, six hundred thirty-one".