199780554 has 32 divisors (see below), whose sum is σ = 434165760. Its totient is φ = 61052400.

The previous prime is 199780547. The next prime is 199780561. The reversal of 199780554 is 455087991.

199780554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199780547) and next prime (199780561).

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, 24732 + ... + 31799.

It is an arithmetic number, because the mean of its divisors is an integer number (13567680).

Almost surely, 2^199780554 is an apocalyptic number.

199780554 is an abundant number, since it is smaller than the sum of its proper divisors (234385206).

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

199780554 is a wasteful number, since it uses less digits than its factorization.

199780554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56586.

The product of its (nonzero) digits is 453600, while the sum is 48.

The square root of 199780554 is about 14134.3749065885. The cubic root of 199780554 is about 584.5895813679.

The spelling of 199780554 in words is "one hundred ninety-nine million, seven hundred eighty thousand, five hundred fifty-four".