99020148561 has 6 divisors (see below), whose sum is σ = 143029103490. Its totient is φ = 66013432368.

The previous prime is 99020148553. The next prime is 99020148583. The reversal of 99020148561 is 16584102099.

99020148561 is a `hidden beast` number, since 9 + 90 + 20 + 1 + 485 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76383140625 + 22637007936 = 276375^2 + 150456^2 .

It is not a de Polignac number, because 99020148561 - 2³ = 99020148553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99020148511) 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 5 ways as a sum of consecutive naturals, for example, 5501119356 + ... + 5501119373.

It is an arithmetic number, because the mean of its divisors is an integer number (23838183915).

Almost surely, 2^99020148561 is an apocalyptic number.

It is an amenable number.

99020148561 is a deficient number, since it is larger than the sum of its proper divisors (44008954929).

99020148561 is a wasteful number, since it uses less digits than its factorization.

99020148561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11002238735 (or 11002238732 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 99020148561 in words is "ninety-nine billion, twenty million, one hundred forty-eight thousand, five hundred sixty-one".