97574489977 has 24 divisors (see below), whose sum is σ = 105195699000. Its totient is φ = 90469933056.

The previous prime is 97574489953. The next prime is 97574490053. The reversal of 97574489977 is 77998447579.

It can be written as a sum of positive squares in 12 ways, for example, as 614494521 + 96959995456 = 24789^2 + 311384^2 .

It is a de Polignac number, because none of the positive numbers 2^k-97574489977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97574489917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22128549 + ... + 22132957.

It is an arithmetic number, because the mean of its divisors is an integer number (4383154125).

Almost surely, 2^97574489977 is an apocalyptic number.

It is an amenable number.

97574489977 is a deficient number, since it is larger than the sum of its proper divisors (7621209023).

97574489977 is a wasteful number, since it uses less digits than its factorization.

97574489977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565 (or 5548 counting only the distinct ones).

The product of its digits is 1120210560, while the sum is 76.

The spelling of 97574489977 in words is "ninety-seven billion, five hundred seventy-four million, four hundred eighty-nine thousand, nine hundred seventy-seven".