47505645 has 24 divisors (see below), whose sum is σ = 89829792. Its totient is φ = 23032800.

The previous prime is 47505629. The next prime is 47505691. The reversal of 47505645 is 54650574.

It is a happy number.

47505645 is a `hidden beast` number, since 4 + 7 + 5 + 0 + 5 + 645 = 666.

It is not a de Polignac number, because 47505645 - 2⁴ = 47505629 is a prime.

It is a super-3 number, since 3×47505645³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47491 + ... + 48480.

It is an arithmetic number, because the mean of its divisors is an integer number (3742908).

Almost surely, 2^47505645 is an apocalyptic number.

47505645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

47505645 is a deficient number, since it is larger than the sum of its proper divisors (42324147).

47505645 is a wasteful number, since it uses less digits than its factorization.

47505645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95993 (or 95990 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 47505645 is about 6892.4338952216. The cubic root of 47505645 is about 362.1721681365.

Subtracting 47505645 from its reverse (54650574), we obtain a square (7144929 = 2673²).

The spelling of 47505645 in words is "forty-seven million, five hundred five thousand, six hundred forty-five".