97144734081 has 16 divisors (see below), whose sum is σ = 130498854080. Its totient is φ = 64277176320.

The previous prime is 97144734073. The next prime is 97144734097. The reversal of 97144734081 is 18043744179.

It is a happy number.

It is not a de Polignac number, because 97144734081 - 2³ = 97144734073 is a prime.

It is a super-2 number, since 2×97144734081² (a number of 23 digits) contains 22 as substring.

It is the 311681-st Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97144734081.

It is not an unprimeable number, because it can be changed into a prime (97144734781) by changing a digit.

It is a nontrivial repunit in base 311680.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366881 + ... + 1436193.

It is an arithmetic number, because the mean of its divisors is an integer number (8156178380).

Almost surely, 2^97144734081 is an apocalyptic number.

It is an amenable number.

97144734081 is a deficient number, since it is larger than the sum of its proper divisors (33354119999).

97144734081 is a wasteful number, since it uses less digits than its factorization.

97144734081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72816.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 97144734081 in words is "ninety-seven billion, one hundred forty-four million, seven hundred thirty-four thousand, eighty-one".