2021556655006 has 8 divisors (see below), whose sum is σ = 3465525694320. Its totient is φ = 866381423568.

The previous prime is 2021556654983. The next prime is 2021556655067. The reversal of 2021556655006 is 6005566551202.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72198451951 + ... + 72198451978.

It is an arithmetic number, because the mean of its divisors is an integer number (433190711790).

Almost surely, 2^{2021556655006} is an apocalyptic number.

2021556655006 is a deficient number, since it is larger than the sum of its proper divisors (1443969039314).

2021556655006 is a wasteful number, since it uses less digits than its factorization.

2021556655006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144396903938.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 2021556655006 in words is "two trillion, twenty-one billion, five hundred fifty-six million, six hundred fifty-five thousand, six".