194849239440 has 80 divisors (see below), whose sum is σ = 604157099328. Its totient is φ = 51949091328.

The previous prime is 194849239367. The next prime is 194849239463. The reversal of 194849239440 is 44932948491.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×194849239440² (a number of 23 digits) contains 22 as substring.

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, 1119582 + ... + 1281858.

Almost surely, 2^194849239440 is an apocalyptic number.

194849239440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194849239440 is an abundant number, since it is smaller than the sum of its proper divisors (409307859888).

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

194849239440 is a wasteful number, since it uses less digits than its factorization.

194849239440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167296 (or 167290 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 194849239440 in words is "one hundred ninety-four billion, eight hundred forty-nine million, two hundred thirty-nine thousand, four hundred forty".