97128306863828 has 24 divisors (see below), whose sum is σ = 169997384867688. Its totient is φ = 48557625970176.

The previous prime is 97128306863767. The next prime is 97128306863831. The reversal of 97128306863828 is 82836860382179.

It can be written as a sum of positive squares in 4 ways, for example, as 8105534268484 + 89022772595344 = 2847022^2 + 9435188^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061315000 + ... + 1061406512.

It is an arithmetic number, because the mean of its divisors is an integer number (7083224369487).

Almost surely, 2^{97128306863828} is an apocalyptic number.

It is an amenable number.

97128306863828 is a deficient number, since it is larger than the sum of its proper divisors (72869078003860).

97128306863828 is a wasteful number, since it uses less digits than its factorization.

97128306863828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124283 (or 124281 counting only the distinct ones).

The product of its (nonzero) digits is 334430208, while the sum is 71.

The spelling of 97128306863828 in words is "ninety-seven trillion, one hundred twenty-eight billion, three hundred six million, eight hundred sixty-three thousand, eight hundred twenty-eight".