1151172865 has 8 divisors (see below), whose sum is σ = 1381592808. Its totient is φ = 920814720.

The previous prime is 1151172859. The next prime is 1151172877. The reversal of 1151172865 is 5682711511.

It can be written as a sum of positive squares in 4 ways, for example, as 224640144 + 926532721 = 14988^2 + 30439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1151172865 - 2⁹ = 1151172353 is a prime.

It is a super-2 number, since 2×1151172865² = 2650397930224616450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53595 + ... + 71935.

It is an arithmetic number, because the mean of its divisors is an integer number (172699101).

Almost surely, 2^1151172865 is an apocalyptic number.

It is an amenable number.

1151172865 is a deficient number, since it is larger than the sum of its proper divisors (230419943).

1151172865 is a wasteful number, since it uses less digits than its factorization.

1151172865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30899.

The product of its digits is 16800, while the sum is 37.

The square root of 1151172865 is about 33928.9384596689. The cubic root of 1151172865 is about 1048.0456056067.

The spelling of 1151172865 in words is "one billion, one hundred fifty-one million, one hundred seventy-two thousand, eight hundred sixty-five".