99640555655248 has 20 divisors (see below), whose sum is σ = 194132088188640. Its totient is φ = 49541952251744.

The previous prime is 99640555655243. The next prime is 99640555655309. The reversal of 99640555655248 is 84255655504699.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99640555655243) 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, 17395345540 + ... + 17395351267.

It is an arithmetic number, because the mean of its divisors is an integer number (9706604409432).

Almost surely, 2^{99640555655248} is an apocalyptic number.

It is an amenable number.

99640555655248 is a deficient number, since it is larger than the sum of its proper divisors (94491532533392).

99640555655248 is a wasteful number, since it uses less digits than its factorization.

99640555655248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34790696994 (or 34790696988 counting only the distinct ones).

The product of its (nonzero) digits is 2332800000, while the sum is 73.

The spelling of 99640555655248 in words is "ninety-nine trillion, six hundred forty billion, five hundred fifty-five million, six hundred fifty-five thousand, two hundred forty-eight".