99747999555 has 32 divisors (see below), whose sum is σ = 164778700800. Its totient is φ = 51472333440.

The previous prime is 99747999553. The next prime is 99747999577. The reversal of 99747999555 is 55599974799.

It is not a de Polignac number, because 99747999555 - 2¹ = 99747999553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99747999553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2595621 + ... + 2633769.

It is an arithmetic number, because the mean of its divisors is an integer number (5149334400).

Almost surely, 2^99747999555 is an apocalyptic number.

99747999555 is a deficient number, since it is larger than the sum of its proper divisors (65030701245).

99747999555 is a wasteful number, since it uses less digits than its factorization.

99747999555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43811.

The product of its digits is 1446700500, while the sum is 78.

The spelling of 99747999555 in words is "ninety-nine billion, seven hundred forty-seven million, nine hundred ninety-nine thousand, five hundred fifty-five".