199455660940 has 24 divisors (see below), whose sum is σ = 418865558832. Its totient is φ = 79780612800.

The previous prime is 199455660923. The next prime is 199455660947. The reversal of 199455660940 is 49066554991.

It is not an unprimeable number, because it can be changed into a prime (199455660947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1477347 + ... + 1606693.

It is an arithmetic number, because the mean of its divisors is an integer number (17452731618).

Almost surely, 2^199455660940 is an apocalyptic number.

199455660940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199455660940 is an abundant number, since it is smaller than the sum of its proper divisors (219409897892).

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

199455660940 is a wasteful number, since it uses less digits than its factorization.

199455660940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206457 (or 206455 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 58.

The spelling of 199455660940 in words is "one hundred ninety-nine billion, four hundred fifty-five million, six hundred sixty thousand, nine hundred forty".