99551649978382 has 32 divisors (see below), whose sum is σ = 183464246983680. Its totient is φ = 39559478245920.

The previous prime is 99551649978371. The next prime is 99551649978409. The reversal of 99551649978382 is 28387994615599.

It is a happy number.

It is a super-2 number, since 2×99551649978382² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99551649978382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3981416469 + ... + 3981441472.

It is an arithmetic number, because the mean of its divisors is an integer number (5733257718240).

Almost surely, 2^{99551649978382} is an apocalyptic number.

99551649978382 is a deficient number, since it is larger than the sum of its proper divisors (83912597005298).

99551649978382 is a wasteful number, since it uses less digits than its factorization.

99551649978382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962858016.

The product of its digits is 10581580800, while the sum is 85.

The spelling of 99551649978382 in words is "ninety-nine trillion, five hundred fifty-one billion, six hundred forty-nine million, nine hundred seventy-eight thousand, three hundred eighty-two".