1994434137450 has 72 divisors (see below), whose sum is σ = 5360493216000. Its totient is φ = 531639326880.

The previous prime is 1994434137439. The next prime is 1994434137467. The reversal of 1994434137450 is 547314344991.

It is a happy number.

1994434137450 is a `hidden beast` number, since 1 + 9 + 94 + 434 + 1 + 3 + 74 + 50 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 269751 + ... + 2015349.

Almost surely, 2^{1994434137450} is an apocalyptic number.

1994434137450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1994434137450 is an abundant number, since it is smaller than the sum of its proper divisors (3366059078550).

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

1994434137450 is a wasteful number, since it uses less digits than its factorization.

1994434137450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748156 (or 1748148 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 1994434137450 in words is "one trillion, nine hundred ninety-four billion, four hundred thirty-four million, one hundred thirty-seven thousand, four hundred fifty".