28921314601 has 2 divisors, whose sum is σ = 28921314602. Its totient is φ = 28921314600.

The previous prime is 28921314577. The next prime is 28921314637. The reversal of 28921314601 is 10641312982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23332257001 + 5589057600 = 152749^2 + 74760^2 .

It is a cyclic number.

It is not a de Polignac number, because 28921314601 - 2¹⁵ = 28921281833 is a prime.

It is not a weakly prime, because it can be changed into another prime (28921314101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14460657300 + 14460657301.

It is an arithmetic number, because the mean of its divisors is an integer number (14460657301).

Almost surely, 2^28921314601 is an apocalyptic number.

It is an amenable number.

28921314601 is a deficient number, since it is larger than the sum of its proper divisors (1).

28921314601 is an equidigital number, since it uses as much as digits as its factorization.

28921314601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 28921314601 in words is "twenty-eight billion, nine hundred twenty-one million, three hundred fourteen thousand, six hundred one".