211664134556616 has 32 divisors (see below), whose sum is σ = 604754670162240. Its totient is φ = 60475467016128.

The previous prime is 211664134556603. The next prime is 211664134556657. The reversal of 211664134556616 is 616655431466112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629952781251 + ... + 629952781586.

It is an arithmetic number, because the mean of its divisors is an integer number (18898583442570).

Almost surely, 2^{211664134556616} is an apocalyptic number.

It is an amenable number.

211664134556616 is an abundant number, since it is smaller than the sum of its proper divisors (393090535605624).

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

211664134556616 is a wasteful number, since it uses less digits than its factorization.

211664134556616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259905562853 (or 1259905562849 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 57.

The spelling of 211664134556616 in words is "two hundred eleven trillion, six hundred sixty-four billion, one hundred thirty-four million, five hundred fifty-six thousand, six hundred sixteen".