1157851917 has 6 divisors (see below), whose sum is σ = 1672452782. Its totient is φ = 771901272.

The previous prime is 1157851897. The next prime is 1157851949. The reversal of 1157851917 is 7191587511.

1157851917 is a `hidden beast` number, since 11 + 578 + 51 + 9 + 17 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1132389801 + 25462116 = 33651^2 + 5046^2 .

It is not a de Polignac number, because 1157851917 - 2¹⁰ = 1157850893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157851217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64325098 + ... + 64325115.

Almost surely, 2^1157851917 is an apocalyptic number.

It is an amenable number.

1157851917 is a deficient number, since it is larger than the sum of its proper divisors (514600865).

1157851917 is a wasteful number, since it uses less digits than its factorization.

1157851917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128650219 (or 128650216 counting only the distinct ones).

The product of its digits is 88200, while the sum is 45.

The square root of 1157851917 is about 34027.2231749815. The cubic root of 1157851917 is about 1050.0686023205.

The spelling of 1157851917 in words is "one billion, one hundred fifty-seven million, eight hundred fifty-one thousand, nine hundred seventeen".