221642673556354 has 64 divisors (see below), whose sum is σ = 341470956718080. Its totient is φ = 107861971020160.

The previous prime is 221642673556327. The next prime is 221642673556427. The reversal of 221642673556354 is 453655376246122.

It is a junction number, because it is equal to n+sod(n) for n = 221642673556292 and 221642673556301.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17071754547 + ... + 17071767529.

It is an arithmetic number, because the mean of its divisors is an integer number (5335483698720).

Almost surely, 2^{221642673556354} is an apocalyptic number.

221642673556354 is a deficient number, since it is larger than the sum of its proper divisors (119828283161726).

221642673556354 is a wasteful number, since it uses less digits than its factorization.

221642673556354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16575.

The product of its digits is 217728000, while the sum is 61.

The spelling of 221642673556354 in words is "two hundred twenty-one trillion, six hundred forty-two billion, six hundred seventy-three million, five hundred fifty-six thousand, three hundred fifty-four".