215545164654 has 32 divisors (see below), whose sum is σ = 450835372800. Its totient is φ = 68571464192.

The previous prime is 215545164613. The next prime is 215545164671. The reversal of 215545164654 is 456461545512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677372 + ... + 1801295.

It is an arithmetic number, because the mean of its divisors is an integer number (14088605400).

Almost surely, 2^215545164654 is an apocalyptic number.

215545164654 is an abundant number, since it is smaller than the sum of its proper divisors (235290208146).

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

215545164654 is a wasteful number, since it uses less digits than its factorization.

215545164654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479144.

The product of its digits is 2880000, while the sum is 48.

The spelling of 215545164654 in words is "two hundred fifteen billion, five hundred forty-five million, one hundred sixty-four thousand, six hundred fifty-four".