97645374077 has 4 divisors (see below), whose sum is σ = 98652027516. Its totient is φ = 96638720640.

The previous prime is 97645374067. The next prime is 97645374121. The reversal of 97645374077 is 77047354679.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77047354679 = 161221 ⋅477899.

It can be written as a sum of positive squares in 2 ways, for example, as 50202435481 + 47442938596 = 224059^2 + 217814^2 .

It is a cyclic number.

It is not a de Polignac number, because 97645374077 - 2¹⁰ = 97645373053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97645374017) 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, 503326574 + ... + 503326767.

It is an arithmetic number, because the mean of its divisors is an integer number (24663006879).

Almost surely, 2^97645374077 is an apocalyptic number.

97645374077 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

97645374077 is a deficient number, since it is larger than the sum of its proper divisors (1006653439).

97645374077 is a wasteful number, since it uses less digits than its factorization.

97645374077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006653438.

The product of its (nonzero) digits is 31116960, while the sum is 59.

The spelling of 97645374077 in words is "ninety-seven billion, six hundred forty-five million, three hundred seventy-four thousand, seventy-seven".