221006226500646 has 16 divisors (see below), whose sum is σ = 442023068338608. Its totient is φ = 73666972944000.

The previous prime is 221006226500627. The next prime is 221006226500663. The reversal of 221006226500646 is 646005622600122.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221006226500598 and 221006226500607.

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, 442035055 + ... + 442534746.

It is an arithmetic number, because the mean of its divisors is an integer number (27626441771163).

Almost surely, 2^{221006226500646} is an apocalyptic number.

221006226500646 is an abundant number, since it is smaller than the sum of its proper divisors (221016841837962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221006226500646 is a wasteful number, since it uses less digits than its factorization.

221006226500646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884611447.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 221006226500646 in words is "two hundred twenty-one trillion, six billion, two hundred twenty-six million, five hundred thousand, six hundred forty-six".