4521722725 has 12 divisors (see below), whose sum is σ = 6038239396. Its totient is φ = 3339118080.

The previous prime is 4521722693. The next prime is 4521722753. The reversal of 4521722725 is 5272271254.

It can be written as a sum of positive squares in 6 ways, for example, as 1994247649 + 2527475076 = 44657^2 + 50274^2 .

It is not a de Polignac number, because 4521722725 - 2⁵ = 4521722693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6956172 + ... + 6956821.

Almost surely, 2^4521722725 is an apocalyptic number.

It is an amenable number.

4521722725 is a deficient number, since it is larger than the sum of its proper divisors (1516516671).

4521722725 is a wasteful number, since it uses less digits than its factorization.

4521722725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13913016 (or 13913011 counting only the distinct ones).

The product of its digits is 78400, while the sum is 37.

The square root of 4521722725 is about 67243.7560298352. The cubic root of 4521722725 is about 1653.6159115253.

Adding to 4521722725 its reverse (5272271254), we get a palindrome (9793993979).

The spelling of 4521722725 in words is "four billion, five hundred twenty-one million, seven hundred twenty-two thousand, seven hundred twenty-five".