199553087620 has 48 divisors (see below), whose sum is σ = 424881738288. Its totient is φ = 78713026560.

The previous prime is 199553087609. The next prime is 199553087621. The reversal of 199553087620 is 26780355991.

It can be written as a sum of positive squares in 8 ways, for example, as 3663638784 + 195889448836 = 60528^2 + 442594^2 .

It is not an unprimeable number, because it can be changed into a prime (199553087621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11030022 + ... + 11048098.

It is an arithmetic number, because the mean of its divisors is an integer number (8851702881).

Almost surely, 2^199553087620 is an apocalyptic number.

199553087620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199553087620 is an abundant number, since it is smaller than the sum of its proper divisors (225328650668).

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

199553087620 is a wasteful number, since it uses less digits than its factorization.

199553087620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25720 (or 25718 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 199553087620 in words is "one hundred ninety-nine billion, five hundred fifty-three million, eighty-seven thousand, six hundred twenty".