191438302454 has 16 divisors (see below), whose sum is σ = 328216455168. Its totient is φ = 82035859752.

The previous prime is 191438302453. The next prime is 191438302493. The reversal of 191438302454 is 454203834191.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191438302453) 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, 629462 + ... + 882665.

It is an arithmetic number, because the mean of its divisors is an integer number (20513528448).

Almost surely, 2^191438302454 is an apocalyptic number.

191438302454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

191438302454 is a deficient number, since it is larger than the sum of its proper divisors (136778152714).

191438302454 is a wasteful number, since it uses less digits than its factorization.

191438302454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521179.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 191438302454 in words is "one hundred ninety-one billion, four hundred thirty-eight million, three hundred two thousand, four hundred fifty-four".