97220717733457 has 4 divisors (see below), whose sum is σ = 100573156276020. Its totient is φ = 93868279190896.

The previous prime is 97220717733383. The next prime is 97220717733463. The reversal of 97220717733457 is 75433771702279.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71348835686976 + 25871882046481 = 8446824^2 + 5086441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97220717733457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97220717733467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1676219271238 + ... + 1676219271295.

It is an arithmetic number, because the mean of its divisors is an integer number (25143289069005).

Almost surely, 2^{97220717733457} is an apocalyptic number.

It is an amenable number.

97220717733457 is a deficient number, since it is larger than the sum of its proper divisors (3352438542563).

97220717733457 is a wasteful number, since it uses less digits than its factorization.

97220717733457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352438542562.

The product of its (nonzero) digits is 108909360, while the sum is 64.

The spelling of 97220717733457 in words is "ninety-seven trillion, two hundred twenty billion, seven hundred seventeen million, seven hundred thirty-three thousand, four hundred fifty-seven".