1151705811 has 4 divisors (see below), whose sum is σ = 1535607752. Its totient is φ = 767803872.

The previous prime is 1151705801. The next prime is 1151705833. The reversal of 1151705811 is 1185071511.

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

It is not a de Polignac number, because 1151705811 - 2⁶ = 1151705747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151705801) 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, 191950966 + ... + 191950971.

It is an arithmetic number, because the mean of its divisors is an integer number (383901938).

Almost surely, 2^1151705811 is an apocalyptic number.

1151705811 is a deficient number, since it is larger than the sum of its proper divisors (383901941).

1151705811 is an equidigital number, since it uses as much as digits as its factorization.

1151705811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383901940.

The product of its (nonzero) digits is 1400, while the sum is 30.

The square root of 1151705811 is about 33936.7914069672. The cubic root of 1151705811 is about 1048.2073147519.

The spelling of 1151705811 in words is "one billion, one hundred fifty-one million, seven hundred five thousand, eight hundred eleven".