97865087520 has 192 divisors, whose sum is σ = 328412206080. Its totient is φ = 24425745408.

The previous prime is 97865087503. The next prime is 97865087533. The reversal of 97865087520 is 2578056879.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 692317 + ... + 821603.

It is an arithmetic number, because the mean of its divisors is an integer number (1710480240).

Almost surely, 2^97865087520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97865087520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164206103040).

97865087520 is an abundant number, since it is smaller than the sum of its proper divisors (230547118560).

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

97865087520 is a wasteful number, since it uses less digits than its factorization.

97865087520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129407 (or 129399 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 57.

The spelling of 97865087520 in words is "ninety-seven billion, eight hundred sixty-five million, eighty-seven thousand, five hundred twenty".