87724644445 has 8 divisors (see below), whose sum is σ = 105418053720. Its totient is φ = 70080728640.

The previous prime is 87724644437. The next prime is 87724644457. The reversal of 87724644445 is 54444642778.

It can be written as a sum of positive squares in 4 ways, for example, as 9193549689 + 78531094756 = 95883^2 + 280234^2 .

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

It is not a de Polignac number, because 87724644445 - 2³ = 87724644437 is a prime.

It is a super-2 number, since 2×87724644445² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12369466 + ... + 12376555.

It is an arithmetic number, because the mean of its divisors is an integer number (13177256715).

Almost surely, 2^87724644445 is an apocalyptic number.

It is an amenable number.

87724644445 is a deficient number, since it is larger than the sum of its proper divisors (17693409275).

87724644445 is a wasteful number, since it uses less digits than its factorization.

87724644445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24746735.

The product of its digits is 24084480, while the sum is 55.

The spelling of 87724644445 in words is "eighty-seven billion, seven hundred twenty-four million, six hundred forty-four thousand, four hundred forty-five".