28232642761 has 4 divisors (see below), whose sum is σ = 29460148992. Its totient is φ = 27005136532.

The previous prime is 28232642743. The next prime is 28232642777. The reversal of 28232642761 is 16724623282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28232642761 - 2⁵ = 28232642729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28232642161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613753081 + ... + 613753126.

It is an arithmetic number, because the mean of its divisors is an integer number (7365037248).

Almost surely, 2^28232642761 is an apocalyptic number.

It is an amenable number.

28232642761 is a deficient number, since it is larger than the sum of its proper divisors (1227506231).

28232642761 is a wasteful number, since it uses less digits than its factorization.

28232642761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227506230.

The product of its digits is 387072, while the sum is 43.

The spelling of 28232642761 in words is "twenty-eight billion, two hundred thirty-two million, six hundred forty-two thousand, seven hundred sixty-one".