194949257440 has 48 divisors (see below), whose sum is σ = 526362998112. Its totient is φ = 66839745024.

The previous prime is 194949257357. The next prime is 194949257449. The reversal of 194949257440 is 44752949491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194949257449) 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, 87029799 + ... + 87032038.

It is an arithmetic number, because the mean of its divisors is an integer number (10965895794).

Almost surely, 2^194949257440 is an apocalyptic number.

194949257440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194949257440 is an abundant number, since it is smaller than the sum of its proper divisors (331413740672).

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

194949257440 is a wasteful number, since it uses less digits than its factorization.

194949257440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174061859 (or 174061851 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 194949257440 in words is "one hundred ninety-four billion, nine hundred forty-nine million, two hundred fifty-seven thousand, four hundred forty".