28550381751 has 6 divisors (see below), whose sum is σ = 41239440320. Its totient is φ = 19033587828.

The previous prime is 28550381729. The next prime is 28550381759. The reversal of 28550381751 is 15718305582.

28550381751 is a `hidden beast` number, since 2 + 8 + 550 + 38 + 17 + 51 = 666.

It is not a de Polignac number, because 28550381751 - 2⁵ = 28550381719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28550381697 and 28550381706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550381759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1586132311 + ... + 1586132328.

Almost surely, 2^28550381751 is an apocalyptic number.

28550381751 is a deficient number, since it is larger than the sum of its proper divisors (12689058569).

28550381751 is a wasteful number, since it uses less digits than its factorization.

28550381751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172264645 (or 3172264642 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The spelling of 28550381751 in words is "twenty-eight billion, five hundred fifty million, three hundred eighty-one thousand, seven hundred fifty-one".