1010561018 has 24 divisors (see below), whose sum is σ = 1614624660. Its totient is φ = 474258240.

The previous prime is 1010561011. The next prime is 1010561029. The reversal of 1010561018 is 8101650101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1003178929 + 7382089 = 31673^2 + 2717^2 .

It is a super-2 number, since 2×1010561018² = 2042467142202392648, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1010560984 and 1010561002.

It is not an unprimeable number, because it can be changed into a prime (1010561011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72278 + ... + 85118.

Almost surely, 2^1010561018 is an apocalyptic number.

1010561018 is a deficient number, since it is larger than the sum of its proper divisors (604063642).

1010561018 is a wasteful number, since it uses less digits than its factorization.

1010561018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12990 (or 12971 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 1010561018 is about 31789.3223897585. The cubic root of 1010561018 is about 1003.5080187477.

The spelling of 1010561018 in words is "one billion, ten million, five hundred sixty-one thousand, eighteen".