97136812642 has 4 divisors (see below), whose sum is σ = 145705218966. Its totient is φ = 48568406320.

The previous prime is 97136812631. The next prime is 97136812667. The reversal of 97136812642 is 24621863179.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 86947727161 + 10189085481 = 294869^2 + 100941^2 .

It is a super-2 number, since 2×97136812642² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24284203159 + ... + 24284203162.

Almost surely, 2^97136812642 is an apocalyptic number.

97136812642 is a deficient number, since it is larger than the sum of its proper divisors (48568406324).

97136812642 is a wasteful number, since it uses less digits than its factorization.

97136812642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48568406323.

The product of its digits is 870912, while the sum is 49.

The spelling of 97136812642 in words is "ninety-seven billion, one hundred thirty-six million, eight hundred twelve thousand, six hundred forty-two".