99657019225 has 27 divisors (see below), whose sum is σ = 130460207583. Its totient is φ = 75506801040.

The previous prime is 99657019211. The next prime is 99657019229. The reversal of 99657019225 is 52291075699.

The square root of 99657019225 is 315685.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 35876526921 + 63780492304 = 189411^2 + 252548^2 .

It is not a de Polignac number, because 99657019225 - 2⁷ = 99657019097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99657019229) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 29988414 + ... + 29991736.

Almost surely, 2^99657019225 is an apocalyptic number.

99657019225 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99657019225 is the 315685-th square number.

99657019225 is the 157843-rd centered octagonal number.

It is an amenable number.

99657019225 is a deficient number, since it is larger than the sum of its proper divisors (30803188358).

99657019225 is an frugal number, since it uses more digits than its factorization.

99657019225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694 (or 3347 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 55.

The spelling of 99657019225 in words is "ninety-nine billion, six hundred fifty-seven million, nineteen thousand, two hundred twenty-five".