28081472751 has 24 divisors (see below), whose sum is σ = 42160350960. Its totient is φ = 17995533696.

The previous prime is 28081472723. The next prime is 28081472761. The reversal of 28081472751 is 15727418082.

It is not a de Polignac number, because 28081472751 - 2⁶ = 28081472687 is a prime.

It is a super-2 number, since 2×28081472751² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28081472697 and 28081472706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081472761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480366 + ... + 535643.

It is an arithmetic number, because the mean of its divisors is an integer number (1756681290).

Almost surely, 2^28081472751 is an apocalyptic number.

28081472751 is a deficient number, since it is larger than the sum of its proper divisors (14078878209).

28081472751 is a wasteful number, since it uses less digits than its factorization.

28081472751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016135 (or 1016132 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 28081472751 in words is "twenty-eight billion, eighty-one million, four hundred seventy-two thousand, seven hundred fifty-one".