45981618 has 32 divisors (see below), whose sum is σ = 95427072. Its totient is φ = 14755200.

The previous prime is 45981571. The next prime is 45981619. The reversal of 45981618 is 81618954.

It is a super-2 number, since 2×45981618² = 4228618387795848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45981618.

It is not an unprimeable number, because it can be changed into a prime (45981619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42808 + ... + 43868.

It is an arithmetic number, because the mean of its divisors is an integer number (2982096).

Almost surely, 2^45981618 is an apocalyptic number.

45981618 is an abundant number, since it is smaller than the sum of its proper divisors (49445454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45981618 is a wasteful number, since it uses less digits than its factorization.

45981618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330.

The product of its digits is 69120, while the sum is 42.

The square root of 45981618 is about 6780.9747086979. The cubic root of 45981618 is about 358.2570535066.

It can be divided in two parts, 4598 and 1618, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 45981618 in words is "forty-five million, nine hundred eighty-one thousand, six hundred eighteen".