1151381817 has 32 divisors (see below), whose sum is σ = 1873612800. Its totient is φ = 695564496.

The previous prime is 1151381773. The next prime is 1151381827. The reversal of 1151381817 is 7181831511.

It is not a de Polignac number, because 1151381817 - 2¹⁵ = 1151349049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1151381827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36993 + ... + 60590.

It is an arithmetic number, because the mean of its divisors is an integer number (58550400).

Almost surely, 2^1151381817 is an apocalyptic number.

It is an amenable number.

1151381817 is a deficient number, since it is larger than the sum of its proper divisors (722230983).

1151381817 is a wasteful number, since it uses less digits than its factorization.

1151381817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97634 (or 97628 counting only the distinct ones).

The product of its digits is 6720, while the sum is 36.

The square root of 1151381817 is about 33932.0175792716. The cubic root of 1151381817 is about 1048.1090128161.

The spelling of 1151381817 in words is "one billion, one hundred fifty-one million, three hundred eighty-one thousand, eight hundred seventeen".