99361557551 has 4 divisors (see below), whose sum is σ = 105206355072. Its totient is φ = 93516760032.

The previous prime is 99361557541. The next prime is 99361557553. The reversal of 99361557551 is 15575516399.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99361557551 - 2¹⁰ = 99361556527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99361557553) 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, 2922398735 + ... + 2922398768.

It is an arithmetic number, because the mean of its divisors is an integer number (26301588768).

Almost surely, 2^99361557551 is an apocalyptic number.

99361557551 is a deficient number, since it is larger than the sum of its proper divisors (5844797521).

99361557551 is a wasteful number, since it uses less digits than its factorization.

99361557551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5844797520.

The product of its digits is 6378750, while the sum is 56.

The spelling of 99361557551 in words is "ninety-nine billion, three hundred sixty-one million, five hundred fifty-seven thousand, five hundred fifty-one".