97745274797640 has 1024 divisors, whose sum is σ = 337444932096000. Its totient is φ = 22520530206720.

The previous prime is 97745274797629. The next prime is 97745274797671. The reversal of 97745274797640 is 4679747254779.

It is a Cunningham number, because it is equal to 9886621²-1.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 31439456406 + ... + 31439459514.

It is an arithmetic number, because the mean of its divisors is an integer number (329536066500).

Almost surely, 2^{97745274797640} 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 97745274797640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168722466048000).

97745274797640 is an abundant number, since it is smaller than the sum of its proper divisors (239699657298360).

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

97745274797640 is a wasteful number, since it uses less digits than its factorization.

97745274797640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530 (or 3526 counting only the distinct ones).

The product of its (nonzero) digits is 5227649280, while the sum is 78.

The spelling of 97745274797640 in words is "ninety-seven trillion, seven hundred forty-five billion, two hundred seventy-four million, seven hundred ninety-seven thousand, six hundred forty".