215445036544 has 20 divisors (see below), whose sum is σ = 430469283024. Its totient is φ = 107722518016.

The previous prime is 215445036533. The next prime is 215445036589. The reversal of 215445036544 is 445630544512.

It is a self number, because there is not a number n which added to its sum of digits gives 215445036544.

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, 210395032 + ... + 210396055.

Almost surely, 2^215445036544 is an apocalyptic number.

It is an amenable number.

215445036544 is a deficient number, since it is larger than the sum of its proper divisors (215024246480).

215445036544 is an frugal number, since it uses more digits than its factorization.

215445036544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420791105 (or 420791089 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 215445036544 in words is "two hundred fifteen billion, four hundred forty-five million, thirty-six thousand, five hundred forty-four".