28079381501 has 2 divisors, whose sum is σ = 28079381502. Its totient is φ = 28079381500.

The previous prime is 28079381497. The next prime is 28079381513. The reversal of 28079381501 is 10518397082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21810859225 + 6268522276 = 147685^2 + 79174^2 .

It is a cyclic number.

It is not a de Polignac number, because 28079381501 - 2² = 28079381497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28079351501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039690750 + 14039690751.

It is an arithmetic number, because the mean of its divisors is an integer number (14039690751).

Almost surely, 2^28079381501 is an apocalyptic number.

It is an amenable number.

28079381501 is a deficient number, since it is larger than the sum of its proper divisors (1).

28079381501 is an equidigital number, since it uses as much as digits as its factorization.

28079381501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 28079381501 in words is "twenty-eight billion, seventy-nine million, three hundred eighty-one thousand, five hundred one".