212178133746 has 32 divisors (see below), whose sum is σ = 474399664320. Its totient is φ = 70292139552.

The previous prime is 212178133693. The next prime is 212178133757. The reversal of 212178133746 is 647331871212.

212178133746 is a `hidden beast` number, since 21 + 217 + 81 + 337 + 4 + 6 = 666.

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, 12044035 + ... + 12061638.

It is an arithmetic number, because the mean of its divisors is an integer number (14824989510).

Almost surely, 2^212178133746 is an apocalyptic number.

212178133746 is an abundant number, since it is smaller than the sum of its proper divisors (262221530574).

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

212178133746 is a wasteful number, since it uses less digits than its factorization.

212178133746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24105847 (or 24105841 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The spelling of 212178133746 in words is "two hundred twelve billion, one hundred seventy-eight million, one hundred thirty-three thousand, seven hundred forty-six".