1148541778 has 4 divisors (see below), whose sum is σ = 1722812670. Its totient is φ = 574270888.

The previous prime is 1148541763. The next prime is 1148541809. The reversal of 1148541778 is 8771458411.

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

It can be written as a sum of positive squares in only one way, i.e., 768564729 + 379977049 = 27723^2 + 19493^2 .

It is a super-2 number, since 2×1148541778² = 2638296431622802568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 287135443 + ... + 287135446.

Almost surely, 2^1148541778 is an apocalyptic number.

1148541778 is a deficient number, since it is larger than the sum of its proper divisors (574270892).

1148541778 is an equidigital number, since it uses as much as digits as its factorization.

1148541778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574270891.

The product of its digits is 250880, while the sum is 46.

The square root of 1148541778 is about 33890.1427851817. The cubic root of 1148541778 is about 1047.2465357353.

The spelling of 1148541778 in words is "one billion, one hundred forty-eight million, five hundred forty-one thousand, seven hundred seventy-eight".