4521621263 has 4 divisors (see below), whose sum is σ = 4521788760. Its totient is φ = 4521453768.

The previous prime is 4521621233. The next prime is 4521621271. The reversal of 4521621263 is 3621261254.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4521621263 - 2¹² = 4521617167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4521621233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33008 + ... + 100661.

It is an arithmetic number, because the mean of its divisors is an integer number (1130447190).

Almost surely, 2^4521621263 is an apocalyptic number.

4521621263 is a deficient number, since it is larger than the sum of its proper divisors (167497).

4521621263 is a wasteful number, since it uses less digits than its factorization.

4521621263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167496.

The product of its digits is 17280, while the sum is 32.

The square root of 4521621263 is about 67243.0015912437. The cubic root of 4521621263 is about 1653.6035430511.

The spelling of 4521621263 in words is "four billion, five hundred twenty-one million, six hundred twenty-one thousand, two hundred sixty-three".