6171994140 has 48 divisors (see below), whose sum is σ = 18610938528. Its totient is φ = 1519259904.

The previous prime is 6171994123. The next prime is 6171994187. The reversal of 6171994140 is 414991716.

It is a junction number, because it is equal to n+sod(n) for n = 6171994092 and 6171994101.

It is a congruent number.

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, 3955627 + ... + 3957186.

It is an arithmetic number, because the mean of its divisors is an integer number (387727886).

Almost surely, 2^6171994140 is an apocalyptic number.

6171994140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6171994140 is an abundant number, since it is smaller than the sum of its proper divisors (12438944388).

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

6171994140 is a wasteful number, since it uses less digits than its factorization.

6171994140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7912838 (or 7912836 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 6171994140 is about 78562.0400702528. The cubic root of 6171994140 is about 1834.3202832126.

The spelling of 6171994140 in words is "six billion, one hundred seventy-one million, nine hundred ninety-four thousand, one hundred forty".