4527999621 has 6 divisors (see below), whose sum is σ = 6540443910. Its totient is φ = 3018666408.

The previous prime is 4527999577. The next prime is 4527999661. The reversal of 4527999621 is 1269997254.

4527999621 is a `hidden beast` number, since 4 + 5 + 2 + 7 + 9 + 9 + 9 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4455562500 + 72437121 = 66750^2 + 8511^2 .

It is not a de Polignac number, because 4527999621 - 2¹⁰ = 4527998597 is a prime.

It is a super-2 number, since 2×4527999621² = 41005561135552287282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4527999661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 251555526 + ... + 251555543.

It is an arithmetic number, because the mean of its divisors is an integer number (1090073985).

Almost surely, 2^4527999621 is an apocalyptic number.

It is an amenable number.

4527999621 is a deficient number, since it is larger than the sum of its proper divisors (2012444289).

4527999621 is a wasteful number, since it uses less digits than its factorization.

4527999621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503111075 (or 503111072 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 4527999621 is about 67290.4125488914. The cubic root of 4527999621 is about 1654.3807215014.

The spelling of 4527999621 in words is "four billion, five hundred twenty-seven million, nine hundred ninety-nine thousand, six hundred twenty-one".