99717255450 has 144 divisors (see below), whose sum is σ = 282376312920. Its totient is φ = 25189731840.

The previous prime is 99717255433. The next prime is 99717255461. The reversal of 99717255450 is 5455271799.

It is a happy number.

99717255450 is a `hidden beast` number, since 9 + 9 + 71 + 7 + 25 + 545 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 8541641241 + 91175614209 = 92421^2 + 301953^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 619564 + ... + 763736.

Almost surely, 2^99717255450 is an apocalyptic number.

99717255450 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 99717255450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141188156460).

99717255450 is an abundant number, since it is smaller than the sum of its proper divisors (182659057470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99717255450 is a wasteful number, since it uses less digits than its factorization.

99717255450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144273 (or 144265 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 54.

The spelling of 99717255450 in words is "ninety-nine billion, seven hundred seventeen million, two hundred fifty-five thousand, four hundred fifty".