97944991222456 has 128 divisors (see below), whose sum is σ = 221403306700800. Its totient is φ = 39681775272960.

The previous prime is 97944991222439. The next prime is 97944991222457. The reversal of 97944991222456 is 65422219944979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97944991222457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 937462636 + ... + 937567108.

It is an arithmetic number, because the mean of its divisors is an integer number (1729713333600).

Almost surely, 2^{97944991222456} 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 97944991222456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110701653350400).

97944991222456 is an abundant number, since it is smaller than the sum of its proper divisors (123458315478344).

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

97944991222456 is a wasteful number, since it uses less digits than its factorization.

97944991222456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106389 (or 106385 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 73.

The spelling of 97944991222456 in words is "ninety-seven trillion, nine hundred forty-four billion, nine hundred ninety-one million, two hundred twenty-two thousand, four hundred fifty-six".