45640621 has 8 divisors (see below), whose sum is σ = 49744800. Its totient is φ = 41621232.

The previous prime is 45640607. The next prime is 45640633. The reversal of 45640621 is 12604654.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45640621 - 2¹¹ = 45638573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45640621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45640681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20071 + ... + 22228.

It is an arithmetic number, because the mean of its divisors is an integer number (6218100).

Almost surely, 2^45640621 is an apocalyptic number.

It is an amenable number.

45640621 is a deficient number, since it is larger than the sum of its proper divisors (4104179).

45640621 is a wasteful number, since it uses less digits than its factorization.

45640621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42395.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 45640621 is about 6755.7842623932. The cubic root of 45640621 is about 357.3692507668.

It can be divided in two parts, 4 and 5640621, that added together give a square (5640625 = 2375²).

The spelling of 45640621 in words is "forty-five million, six hundred forty thousand, six hundred twenty-one".