199123635040 has 96 divisors (see below), whose sum is σ = 520424352000. Its totient is φ = 71388710400.

The previous prime is 199123635037. The next prime is 199123635101. The reversal of 199123635040 is 40536321991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671790 + ... + 921709.

It is an arithmetic number, because the mean of its divisors is an integer number (5421087000).

Almost surely, 2^199123635040 is an apocalyptic number.

199123635040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199123635040 is an abundant number, since it is smaller than the sum of its proper divisors (321300716960).

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

199123635040 is a wasteful number, since it uses less digits than its factorization.

199123635040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593596 (or 1593588 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 199123635040 in words is "one hundred ninety-nine billion, one hundred twenty-three million, six hundred thirty-five thousand, forty".