97158615606649 has 9 divisors (see below), whose sum is σ = 97864007163663. Its totient is φ = 96458272507392.

The previous prime is 97158615606589. The next prime is 97158615606763. The reversal of 97158615606649 is 94660651685179.

It is a happy number.

The square root of 97158615606649 is 9856907.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 52435049852025 + 44723565754624 = 7241205^2 + 6687568^2 .

It is a de Polignac number, because none of the positive numbers 2^k-97158615606649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97158615616649) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1370074617 + ... + 1370145529.

Almost surely, 2^{97158615606649} is an apocalyptic number.

97158615606649 is the 9856907-th square number.

97158615606649 is the 4928454-th centered octagonal number.

It is an amenable number.

97158615606649 is a deficient number, since it is larger than the sum of its proper divisors (705391557014).

97158615606649 is an frugal number, since it uses more digits than its factorization.

97158615606649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142104 (or 71052 counting only the distinct ones).

The product of its (nonzero) digits is 587865600, while the sum is 73.

The spelling of 97158615606649 in words is "ninety-seven trillion, one hundred fifty-eight billion, six hundred fifteen million, six hundred six thousand, six hundred forty-nine".