97658539813 has 8 divisors (see below), whose sum is σ = 103414774680. Its totient is φ = 91903595520.

The previous prime is 97658539777. The next prime is 97658539817. The reversal of 97658539813 is 31893585679.

It can be written as a sum of positive squares in 4 ways, for example, as 51750335169 + 45908204644 = 227487^2 + 214262^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97658539813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97658539817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164628 + ... + 471613.

It is an arithmetic number, because the mean of its divisors is an integer number (12926846835).

Almost surely, 2^97658539813 is an apocalyptic number.

It is an amenable number.

97658539813 is a deficient number, since it is larger than the sum of its proper divisors (5756234867).

97658539813 is a wasteful number, since it uses less digits than its factorization.

97658539813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645287.

The product of its digits is 48988800, while the sum is 64.

The spelling of 97658539813 in words is "ninety-seven billion, six hundred fifty-eight million, five hundred thirty-nine thousand, eight hundred thirteen".