28553232418 has 8 divisors (see below), whose sum is σ = 42832698012. Its totient is φ = 14275666416.

The previous prime is 28553232377. The next prime is 28553232427. The reversal of 28553232418 is 81423235582.

It can be written as a sum of positive squares in 2 ways, for example, as 28437088689 + 116143729 = 168633^2 + 10777^2 .

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

It is a super-2 number, since 2×28553232418² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436705 + ... + 497812.

Almost surely, 2^28553232418 is an apocalyptic number.

28553232418 is a deficient number, since it is larger than the sum of its proper divisors (14279465594).

28553232418 is a wasteful number, since it uses less digits than its factorization.

28553232418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949796.

The product of its digits is 460800, while the sum is 43.

The spelling of 28553232418 in words is "twenty-eight billion, five hundred fifty-three million, two hundred thirty-two thousand, four hundred eighteen".