6840144957 has 8 divisors (see below), whose sum is σ = 9189813600. Its totient is φ = 4525286480.

The previous prime is 6840144901. The next prime is 6840144959. The reversal of 6840144957 is 7594410486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6840144957 - 2¹² = 6840140861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840144959) 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, 8702082 + ... + 8702867.

It is an arithmetic number, because the mean of its divisors is an integer number (1148726700).

Almost surely, 2^6840144957 is an apocalyptic number.

It is an amenable number.

6840144957 is a deficient number, since it is larger than the sum of its proper divisors (2349668643).

6840144957 is a wasteful number, since it uses less digits than its factorization.

6840144957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17405083.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 6840144957 is about 82705.1688650715. The cubic root of 6840144957 is about 1898.2574010508.

The spelling of 6840144957 in words is "six billion, eight hundred forty million, one hundred forty-four thousand, nine hundred fifty-seven".