99145572952969 has 3 divisors (see below), whose sum is σ = 99145582910157. Its totient is φ = 99145562995782.

The previous prime is 99145572952961. The next prime is 99145572952981. The reversal of 99145572952969 is 96925927554199.

The square root of 99145572952969 is 9957187.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 99145572952969 - 2³ = 99145572952961 is a prime.

It is a super-2 number, since 2×99145572952969² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99145572952892 and 99145572952901.

It is not an unprimeable number, because it can be changed into a prime (99145572952961) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4978594 + ... + 14935780.

It is an arithmetic number, because the mean of its divisors is an integer number (33048527636719).

Almost surely, 2^{99145572952969} is an apocalyptic number.

99145572952969 is the 9957187-th square number.

99145572952969 is the 4978594-th centered octagonal number.

It is an amenable number.

99145572952969 is a deficient number, since it is larger than the sum of its proper divisors (9957188).

99145572952969 is an frugal number, since it uses more digits than its factorization.

99145572952969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19914374 (or 9957187 counting only the distinct ones).

The product of its digits is 4960116000, while the sum is 82.

The spelling of 99145572952969 in words is "ninety-nine trillion, one hundred forty-five billion, five hundred seventy-two million, nine hundred fifty-two thousand, nine hundred sixty-nine".