6391174940 has 12 divisors (see below), whose sum is σ = 13421467416. Its totient is φ = 2556469968.

The previous prime is 6391174921. The next prime is 6391174963. The reversal of 6391174940 is 494711936.

It is a super-2 number, since 2×6391174940² = 81694234227368007200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6391174891 and 6391174900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159779354 + ... + 159779393.

It is an arithmetic number, because the mean of its divisors is an integer number (1118455618).

Almost surely, 2^6391174940 is an apocalyptic number.

It is an amenable number.

6391174940 is an abundant number, since it is smaller than the sum of its proper divisors (7030292476).

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

6391174940 is a wasteful number, since it uses less digits than its factorization.

6391174940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319558756 (or 319558754 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 6391174940 is about 79944.8243477963. The cubic root of 6391174940 is about 1855.7817596484.

The spelling of 6391174940 in words is "six billion, three hundred ninety-one million, one hundred seventy-four thousand, nine hundred forty".