28751669971 has 2 divisors, whose sum is σ = 28751669972. Its totient is φ = 28751669970.

The previous prime is 28751669909. The next prime is 28751669983. The reversal of 28751669971 is 17996615782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28751669971 - 2²⁹ = 28214799059 is a prime.

It is a super-2 number, since 2×28751669971² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28751669371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14375834985 + 14375834986.

It is an arithmetic number, because the mean of its divisors is an integer number (14375834986).

Almost surely, 2^28751669971 is an apocalyptic number.

28751669971 is a deficient number, since it is larger than the sum of its proper divisors (1).

28751669971 is an equidigital number, since it uses as much as digits as its factorization.

28751669971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 61.

The spelling of 28751669971 in words is "twenty-eight billion, seven hundred fifty-one million, six hundred sixty-nine thousand, nine hundred seventy-one".