211450664436 has 24 divisors (see below), whose sum is σ = 538238055264. Its totient is φ = 64075958880.

The previous prime is 211450664393. The next prime is 211450664567. The reversal of 211450664436 is 634466054112.

It is a super-2 number, since 2×211450664436² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 800949355 + ... + 800949618.

It is an arithmetic number, because the mean of its divisors is an integer number (22426585636).

Almost surely, 2^211450664436 is an apocalyptic number.

It is an amenable number.

211450664436 is an abundant number, since it is smaller than the sum of its proper divisors (326787390828).

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

211450664436 is a wasteful number, since it uses less digits than its factorization.

211450664436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601898991 (or 1601898989 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 211450664436 in words is "two hundred eleven billion, four hundred fifty million, six hundred sixty-four thousand, four hundred thirty-six".