28551822765 has 8 divisors (see below), whose sum is σ = 45682916448. Its totient is φ = 15227638800.

The previous prime is 28551822763. The next prime is 28551822787. The reversal of 28551822765 is 56722815582.

It is a happy number.

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

It is not a de Polignac number, because 28551822765 - 2¹ = 28551822763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551822763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951727411 + ... + 951727440.

It is an arithmetic number, because the mean of its divisors is an integer number (5710364556).

Almost surely, 2^28551822765 is an apocalyptic number.

It is an amenable number.

28551822765 is a deficient number, since it is larger than the sum of its proper divisors (17131093683).

28551822765 is a wasteful number, since it uses less digits than its factorization.

28551822765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903454859.

The product of its digits is 2688000, while the sum is 51.

The spelling of 28551822765 in words is "twenty-eight billion, five hundred fifty-one million, eight hundred twenty-two thousand, seven hundred sixty-five".