97944895649 has 4 divisors (see below), whose sum is σ = 97949497536. Its totient is φ = 97940293764.

The previous prime is 97944895579. The next prime is 97944895661. The reversal of 97944895649 is 94659844979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97944895649 is a prime.

It is a super-3 number, since 3×97944895649³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97944895679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2268869 + ... + 2311634.

It is an arithmetic number, because the mean of its divisors is an integer number (24487374384).

Almost surely, 2^97944895649 is an apocalyptic number.

It is an amenable number.

97944895649 is a deficient number, since it is larger than the sum of its proper divisors (4601887).

97944895649 is a wasteful number, since it uses less digits than its factorization.

97944895649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601886.

The product of its digits is 705438720, while the sum is 74.

The spelling of 97944895649 in words is "ninety-seven billion, nine hundred forty-four million, eight hundred ninety-five thousand, six hundred forty-nine".