199899540477 has 96 divisors (see below), whose sum is σ = 361283756288. Its totient is φ = 103694266368.

The previous prime is 199899540469. The next prime is 199899540539. The reversal of 199899540477 is 774045998991.

199899540477 is a `hidden beast` number, since 1 + 9 + 9 + 8 + 9 + 9 + 540 + 4 + 77 = 666.

It is not a de Polignac number, because 199899540477 - 2³ = 199899540469 is a prime.

It is a super-2 number, since 2×199899540477² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199899540677) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36926823 + ... + 36932235.

Almost surely, 2^199899540477 is an apocalyptic number.

It is an amenable number.

199899540477 is a deficient number, since it is larger than the sum of its proper divisors (161384215811).

199899540477 is a wasteful number, since it uses less digits than its factorization.

199899540477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6179 (or 6176 counting only the distinct ones).

The product of its (nonzero) digits is 205752960, while the sum is 72.

The spelling of 199899540477 in words is "one hundred ninety-nine billion, eight hundred ninety-nine million, five hundred forty thousand, four hundred seventy-seven".