221534410017464 has 8 divisors (see below), whose sum is σ = 415377018782760. Its totient is φ = 110767205008728.

The previous prime is 221534410017457. The next prime is 221534410017533. The reversal of 221534410017464 is 464710014435122.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13845900626084 + ... + 13845900626099.

It is an arithmetic number, because the mean of its divisors is an integer number (51922127347845).

Almost surely, 2^{221534410017464} is an apocalyptic number.

It is an amenable number.

221534410017464 is a deficient number, since it is larger than the sum of its proper divisors (193842608765296).

221534410017464 is a wasteful number, since it uses less digits than its factorization.

221534410017464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27691801252189 (or 27691801252185 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 44.

The spelling of 221534410017464 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred ten million, seventeen thousand, four hundred sixty-four".