45945549 has 20 divisors (see below), whose sum is σ = 73915996. Its totient is φ = 28273536.

The previous prime is 45945539. The next prime is 45945551. The reversal of 45945549 is 94554954.

45945549 is a `hidden beast` number, since 4 + 5 + 94 + 554 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25857225 + 20088324 = 5085^2 + 4482^2 .

It is not a de Polignac number, because 45945549 - 2⁸ = 45945293 is a prime.

It is a super-2 number, since 2×45945549² = 4221986945822802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45945539) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20764 + ... + 22869.

Almost surely, 2^45945549 is an apocalyptic number.

It is an amenable number.

45945549 is a deficient number, since it is larger than the sum of its proper divisors (27970447).

45945549 is a wasteful number, since it uses less digits than its factorization.

45945549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43658 (or 43649 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 45945549 is about 6778.3146135304. The cubic root of 45945549 is about 358.1633540787.

The spelling of 45945549 in words is "forty-five million, nine hundred forty-five thousand, five hundred forty-nine".