45561987 has 16 divisors (see below), whose sum is σ = 69828000. Its totient is φ = 29326752.

The previous prime is 45561979. The next prime is 45562003. The reversal of 45561987 is 78916554.

45561987 is a `hidden beast` number, since 4 + 5 + 561 + 9 + 87 = 666.

45561987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45561987 - 2³ = 45561979 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (45561587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28312 + ... + 29877.

It is an arithmetic number, because the mean of its divisors is an integer number (4364250).

Almost surely, 2^45561987 is an apocalyptic number.

45561987 is a deficient number, since it is larger than the sum of its proper divisors (24266013).

45561987 is a wasteful number, since it uses less digits than its factorization.

45561987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58227 (or 58221 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 45561987 is about 6749.9619998930. The cubic root of 45561987 is about 357.1638962158.

The spelling of 45561987 in words is "forty-five million, five hundred sixty-one thousand, nine hundred eighty-seven".