1161551747 has 4 divisors (see below), whose sum is σ = 1171831080. Its totient is φ = 1151272416.

The previous prime is 1161551737. The next prime is 1161551777. The reversal of 1161551747 is 7471551611.

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

It is a cyclic number.

It is not a de Polignac number, because 1161551747 - 2¹⁰ = 1161550723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161551747.

It is not an unprimeable number, because it can be changed into a prime (1161551737) 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, 5139497 + ... + 5139722.

It is an arithmetic number, because the mean of its divisors is an integer number (292957770).

Almost surely, 2^1161551747 is an apocalyptic number.

1161551747 is a deficient number, since it is larger than the sum of its proper divisors (10279333).

1161551747 is a wasteful number, since it uses less digits than its factorization.

1161551747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279332.

The product of its digits is 29400, while the sum is 38.

The square root of 1161551747 is about 34081.5455488744. The cubic root of 1161551747 is about 1051.1858852343.

The spelling of 1161551747 in words is "one billion, one hundred sixty-one million, five hundred fifty-one thousand, seven hundred forty-seven".