199906954494 has 64 divisors (see below), whose sum is σ = 449701217280. Its totient is φ = 58832991360.

The previous prime is 199906954459. The next prime is 199906954561. The reversal of 199906954494 is 494459609991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 416742 + ... + 757289.

It is an arithmetic number, because the mean of its divisors is an integer number (7026581520).

Almost surely, 2^199906954494 is an apocalyptic number.

199906954494 is an abundant number, since it is smaller than the sum of its proper divisors (249794262786).

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

199906954494 is a wasteful number, since it uses less digits than its factorization.

199906954494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174145.

The product of its (nonzero) digits is 113374080, while the sum is 69.

The spelling of 199906954494 in words is "one hundred ninety-nine billion, nine hundred six million, nine hundred fifty-four thousand, four hundred ninety-four".