1018861546 has 4 divisors (see below), whose sum is σ = 1528292322. Its totient is φ = 509430772.

The previous prime is 1018861537. The next prime is 1018861549. The reversal of 1018861546 is 6451688101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6451688101 = 31 ⋅208118971.

It can be written as a sum of positive squares in only one way, i.e., 900900225 + 117961321 = 30015^2 + 10861^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1018861499 and 1018861508.

It is not an unprimeable number, because it can be changed into a prime (1018861549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254715385 + ... + 254715388.

Almost surely, 2^1018861546 is an apocalyptic number.

1018861546 is a deficient number, since it is larger than the sum of its proper divisors (509430776).

1018861546 is an equidigital number, since it uses as much as digits as its factorization.

1018861546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509430775.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1018861546 is about 31919.6106805832. The cubic root of 1018861546 is about 1006.2480624116.

The spelling of 1018861546 in words is "one billion, eighteen million, eight hundred sixty-one thousand, five hundred forty-six".