97820251488 has 36 divisors (see below), whose sum is σ = 278176340988. Its totient is φ = 32606750400.

The previous prime is 97820251481. The next prime is 97820251511. The reversal of 97820251488 is 88415202879.

97820251488 is a `hidden beast` number, since 97 + 8 + 20 + 2 + 51 + 488 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97820251481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169826538 + ... + 169827113.

It is an arithmetic number, because the mean of its divisors is an integer number (7727120583).

Almost surely, 2^97820251488 is an apocalyptic number.

It is an amenable number.

97820251488 is an abundant number, since it is smaller than the sum of its proper divisors (180356089500).

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

97820251488 is a wasteful number, since it uses less digits than its factorization.

97820251488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339653667 (or 339653656 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 97820251488 in words is "ninety-seven billion, eight hundred twenty million, two hundred fifty-one thousand, four hundred eighty-eight".