191857442440344 has 16 divisors (see below), whose sum is σ = 479643606100920. Its totient is φ = 63952480813440.

The previous prime is 191857442440333. The next prime is 191857442440351. The reversal of 191857442440344 is 443044244758191.

It is a super-2 number, since 2×191857442440344² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3997030050817 + ... + 3997030050864.

Almost surely, 2^{191857442440344} is an apocalyptic number.

It is an amenable number.

191857442440344 is an abundant number, since it is smaller than the sum of its proper divisors (287786163660576).

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

191857442440344 is a wasteful number, since it uses less digits than its factorization.

191857442440344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7994060101690 (or 7994060101686 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 60.

The spelling of 191857442440344 in words is "one hundred ninety-one trillion, eight hundred fifty-seven billion, four hundred forty-two million, four hundred forty thousand, three hundred forty-four".