1125577778 has 16 divisors (see below), whose sum is σ = 1821752856. Its totient is φ = 518494080.

The previous prime is 1125577741. The next prime is 1125577781. The reversal of 1125577778 is 8777755211.

It can be written as a sum of positive squares in 4 ways, for example, as 628153969 + 497423809 = 25063^2 + 22303^2 .

It is a plaindrome in base 10.

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, 28001 + ... + 55092.

Almost surely, 2^1125577778 is an apocalyptic number.

1125577778 is a deficient number, since it is larger than the sum of its proper divisors (696175078).

1125577778 is a wasteful number, since it uses less digits than its factorization.

1125577778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83629.

The product of its digits is 960400, while the sum is 50.

The square root of 1125577778 is about 33549.6315628056. The cubic root of 1125577778 is about 1040.2199294496.

The spelling of 1125577778 in words is "one billion, one hundred twenty-five million, five hundred seventy-seven thousand, seven hundred seventy-eight".