4505913771621 has 16 divisors (see below), whose sum is σ = 6061704929280. Its totient is φ = 2977108262640.

The previous prime is 4505913771617. The next prime is 4505913771631. The reversal of 4505913771621 is 1261773195054.

It is not a de Polignac number, because 4505913771621 - 2² = 4505913771617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4505913771631) 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, 9223845 + ... + 9700058.

It is an arithmetic number, because the mean of its divisors is an integer number (378856558080).

Almost surely, 2^{4505913771621} is an apocalyptic number.

It is an amenable number.

4505913771621 is a deficient number, since it is larger than the sum of its proper divisors (1555791157659).

4505913771621 is a wasteful number, since it uses less digits than its factorization.

4505913771621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18924616.

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 4505913771621 in words is "four trillion, five hundred five billion, nine hundred thirteen million, seven hundred seventy-one thousand, six hundred twenty-one".