97128065520 has 100 divisors (see below), whose sum is σ = 337340183400. Its totient is φ = 25900815744.

The previous prime is 97128065513. The next prime is 97128065537. The reversal of 97128065520 is 2556082179.

97128065520 is a `hidden beast` number, since 9 + 7 + 12 + 80 + 6 + 552 + 0 = 666.

It is a super-2 number, since 2×97128065520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7487970 + ... + 7500929.

It is an arithmetic number, because the mean of its divisors is an integer number (3373401834).

Almost surely, 2^97128065520 is an apocalyptic number.

97128065520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97128065520 is an abundant number, since it is smaller than the sum of its proper divisors (240212117880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97128065520 is a wasteful number, since it uses less digits than its factorization.

97128065520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14988924 (or 14988909 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 97128065520 in words is "ninety-seven billion, one hundred twenty-eight million, sixty-five thousand, five hundred twenty".