47661645 has 16 divisors (see below), whose sum is σ = 78888960. Its totient is φ = 24542784.

The previous prime is 47661643. The next prime is 47661701. The reversal of 47661645 is 54616674.

47661645 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 47661645 - 2¹ = 47661643 is a prime.

It is a super-3 number, since 3×47661645³ (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 (47661643) 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, 54349 + ... + 55218.

It is an arithmetic number, because the mean of its divisors is an integer number (4930560).

Almost surely, 2^47661645 is an apocalyptic number.

It is an amenable number.

47661645 is a deficient number, since it is larger than the sum of its proper divisors (31227315).

47661645 is a wasteful number, since it uses less digits than its factorization.

47661645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109604.

The product of its digits is 120960, while the sum is 39.

The square root of 47661645 is about 6903.7413769637. The cubic root of 47661645 is about 362.5681710871.

The spelling of 47661645 in words is "forty-seven million, six hundred sixty-one thousand, six hundred forty-five".