6321940557 has 16 divisors (see below), whose sum is σ = 8496690048. Its totient is φ = 4181017280.

The previous prime is 6321940543. The next prime is 6321940561. The reversal of 6321940557 is 7550491236.

It is a cyclic number.

It is not a de Polignac number, because 6321940557 - 2⁸ = 6321940301 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6321940567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226048 + ... + 252470.

It is an arithmetic number, because the mean of its divisors is an integer number (531043128).

Almost surely, 2^6321940557 is an apocalyptic number.

It is an amenable number.

6321940557 is a deficient number, since it is larger than the sum of its proper divisors (2174749491).

6321940557 is a wasteful number, since it uses less digits than its factorization.

6321940557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27060.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 6321940557 is about 79510.6317230595. The cubic root of 6321940557 is about 1849.0563053552.

The spelling of 6321940557 in words is "six billion, three hundred twenty-one million, nine hundred forty thousand, five hundred fifty-seven".