217141401318978 has 32 divisors (see below), whose sum is σ = 457148924640000. Its totient is φ = 68569598979216.

The previous prime is 217141401318953. The next prime is 217141401319009. The reversal of 217141401318978 is 879813104141712.

217141401318978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13286728 + ... + 24714771.

It is an arithmetic number, because the mean of its divisors is an integer number (14285903895000).

Almost surely, 2^{217141401318978} is an apocalyptic number.

217141401318978 is an abundant number, since it is smaller than the sum of its proper divisors (240007523321022).

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

217141401318978 is a wasteful number, since it uses less digits than its factorization.

217141401318978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38051646.

The product of its (nonzero) digits is 2709504, while the sum is 57.

The spelling of 217141401318978 in words is "two hundred seventeen trillion, one hundred forty-one billion, four hundred one million, three hundred eighteen thousand, nine hundred seventy-eight".