97444489920 has 112 divisors (see below), whose sum is σ = 309550783488. Its totient is φ = 25971379200.

The previous prime is 97444489811. The next prime is 97444489939. The reversal of 97444489920 is 2998444479.

It is a Cunningham number, because it is equal to 312161²-1.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1846947 + ... + 1898973.

Almost surely, 2^97444489920 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 97444489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154775391744).

97444489920 is an abundant number, since it is smaller than the sum of its proper divisors (212106293568).

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

97444489920 is a wasteful number, since it uses less digits than its factorization.

97444489920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53998 (or 53988 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 97444489920 in words is "ninety-seven billion, four hundred forty-four million, four hundred eighty-nine thousand, nine hundred twenty".