45045550 has 24 divisors (see below), whose sum is σ = 91402632. Its totient is φ = 16380000.

The previous prime is 45045547. The next prime is 45045557. The reversal of 45045550 is 5554054.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45045557) 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, 40401 + ... + 41500.

It is an arithmetic number, because the mean of its divisors is an integer number (3808443).

Almost surely, 2^45045550 is an apocalyptic number.

45045550 is an abundant number, since it is smaller than the sum of its proper divisors (46357082).

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

45045550 is a wasteful number, since it uses less digits than its factorization.

45045550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81924 (or 81919 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 45045550 is about 6711.5981703317. The cubic root of 45045550 is about 355.8093021936.

The spelling of 45045550 in words is "forty-five million, forty-five thousand, five hundred fifty".