1151878774 has 4 divisors (see below), whose sum is σ = 1727818164. Its totient is φ = 575939386.

The previous prime is 1151878747. The next prime is 1151878787. The reversal of 1151878774 is 4778781511.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 287969692 + ... + 287969695.

It is an arithmetic number, because the mean of its divisors is an integer number (431954541).

Almost surely, 2^1151878774 is an apocalyptic number.

1151878774 is a deficient number, since it is larger than the sum of its proper divisors (575939390).

1151878774 is an equidigital number, since it uses as much as digits as its factorization.

1151878774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575939389.

The product of its digits is 439040, while the sum is 49.

The square root of 1151878774 is about 33939.3396223321. The cubic root of 1151878774 is about 1048.2597853293.

The spelling of 1151878774 in words is "one billion, one hundred fifty-one million, eight hundred seventy-eight thousand, seven hundred seventy-four".