556720358691 has 8 divisors (see below), whose sum is σ = 848335784704. Its totient is φ = 318125919240.

The previous prime is 556720358687. The next prime is 556720358699. The reversal of 556720358691 is 196853027655.

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

It is not a de Polignac number, because 556720358691 - 2² = 556720358687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556720358699) 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, 13255246615 + ... + 13255246656.

It is an arithmetic number, because the mean of its divisors is an integer number (106041973088).

Almost surely, 2^556720358691 is an apocalyptic number.

556720358691 is a deficient number, since it is larger than the sum of its proper divisors (291615426013).

556720358691 is a wasteful number, since it uses less digits than its factorization.

556720358691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26510493281.

The product of its (nonzero) digits is 13608000, while the sum is 57.

The spelling of 556720358691 in words is "five hundred fifty-six billion, seven hundred twenty million, three hundred fifty-eight thousand, six hundred ninety-one".