1117778481 has 16 divisors (see below), whose sum is σ = 1667088000. Its totient is φ = 740181744.

The previous prime is 1117778477. The next prime is 1117778483. The reversal of 1117778481 is 1848777111.

It is not a de Polignac number, because 1117778481 - 2² = 1117778477 is a prime.

It is a super-2 number, since 2×1117778481² = 2498857465173334722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1117778483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134901 + ... + 142946.

It is an arithmetic number, because the mean of its divisors is an integer number (104193000).

Almost surely, 2^1117778481 is an apocalyptic number.

It is an amenable number.

1117778481 is a deficient number, since it is larger than the sum of its proper divisors (549309519).

1117778481 is a wasteful number, since it uses less digits than its factorization.

1117778481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278005 (or 277999 counting only the distinct ones).

The product of its digits is 87808, while the sum is 45.

The square root of 1117778481 is about 33433.1942984813. The cubic root of 1117778481 is about 1037.8117454046.

The spelling of 1117778481 in words is "one billion, one hundred seventeen million, seven hundred seventy-eight thousand, four hundred eighty-one".