556898121898655 has 8 divisors (see below), whose sum is σ = 668277995211600. Its totient is φ = 445518331563456.

The previous prime is 556898121898621. The next prime is 556898121898711.

556898121898655 is nontrivially palindromic in base 10.

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 556898121898655 - 2¹⁸ = 556898121636511 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4875785 + ... + 33727874.

It is an arithmetic number, because the mean of its divisors is an integer number (83534749401450).

Almost surely, 2^{556898121898655} is an apocalyptic number.

556898121898655 is a deficient number, since it is larger than the sum of its proper divisors (111379873312945).

556898121898655 is a wasteful number, since it uses less digits than its factorization.

556898121898655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41488873.

The product of its digits is 14929920000, while the sum is 86.

The spelling of 556898121898655 in words is "five hundred fifty-six trillion, eight hundred ninety-eight billion, one hundred twenty-one million, eight hundred ninety-eight thousand, six hundred fifty-five".