28151262261 has 8 divisors (see below), whose sum is σ = 41705573760. Its totient is φ = 18767508156.

The previous prime is 28151262259. The next prime is 28151262287. The reversal of 28151262261 is 16226215182.

28151262261 is a `hidden beast` number, since 2 + 8 + 15 + 12 + 622 + 6 + 1 = 666.

It is not a de Polignac number, because 28151262261 - 2¹ = 28151262259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28151262241) 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, 521319645 + ... + 521319698.

It is an arithmetic number, because the mean of its divisors is an integer number (5213196720).

Almost surely, 2^28151262261 is an apocalyptic number.

It is an amenable number.

28151262261 is a deficient number, since it is larger than the sum of its proper divisors (13554311499).

28151262261 is a wasteful number, since it uses less digits than its factorization.

28151262261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042639352 (or 1042639346 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The spelling of 28151262261 in words is "twenty-eight billion, one hundred fifty-one million, two hundred sixty-two thousand, two hundred sixty-one".