199410981454 has 4 divisors (see below), whose sum is σ = 299116472184. Its totient is φ = 99705490726.

The previous prime is 199410981449. The next prime is 199410981467. The reversal of 199410981454 is 454189014991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 199410981395 and 199410981404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49852745362 + ... + 49852745365.

It is an arithmetic number, because the mean of its divisors is an integer number (74779118046).

Almost surely, 2^199410981454 is an apocalyptic number.

199410981454 is a deficient number, since it is larger than the sum of its proper divisors (99705490730).

199410981454 is an equidigital number, since it uses as much as digits as its factorization.

199410981454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99705490729.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 199410981454 in words is "one hundred ninety-nine billion, four hundred ten million, nine hundred eighty-one thousand, four hundred fifty-four".