215502040646644 has 12 divisors (see below), whose sum is σ = 381902350513600. Its totient is φ = 106387083357048.

The previous prime is 215502040646531. The next prime is 215502040646689. The reversal of 215502040646644 is 446646040205512.

It is a super-2 number, since 2×215502040646644² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340984241214 + ... + 340984241845.

Almost surely, 2^{215502040646644} is an apocalyptic number.

It is an amenable number.

215502040646644 is a deficient number, since it is larger than the sum of its proper divisors (166400309866956).

215502040646644 is a wasteful number, since it uses less digits than its factorization.

215502040646644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681968483142 (or 681968483140 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 49.

The spelling of 215502040646644 in words is "two hundred fifteen trillion, five hundred two billion, forty million, six hundred forty-six thousand, six hundred forty-four".