45321645 has 16 divisors (see below), whose sum is σ = 73039680. Its totient is φ = 23996544.

The previous prime is 45321641. The next prime is 45321649. The reversal of 45321645 is 54612354.

It is an interprime number because it is at equal distance from previous prime (45321641) and next prime (45321649).

It is not a de Polignac number, because 45321645 - 2² = 45321641 is a prime.

It is a super-3 number, since 3×45321645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45321641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8784 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (4564980).

Almost surely, 2^45321645 is an apocalyptic number.

It is an amenable number.

45321645 is a deficient number, since it is larger than the sum of its proper divisors (27718035).

45321645 is a wasteful number, since it uses less digits than its factorization.

45321645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21884.

The product of its digits is 14400, while the sum is 30.

The square root of 45321645 is about 6732.1352481958. The cubic root of 45321645 is about 356.5347689233.

Adding to 45321645 its reverse (54612354), we get a palindrome (99933999).

The spelling of 45321645 in words is "forty-five million, three hundred twenty-one thousand, six hundred forty-five".