212766672591 has 128 divisors (see below), whose sum is σ = 367667942400. Its totient is φ = 120179220480.

The previous prime is 212766672589. The next prime is 212766672617. The reversal of 212766672591 is 195276667212.

It is a happy number.

It is not a de Polignac number, because 212766672591 - 2¹ = 212766672589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212766672511) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 358796791 + ... + 358797383.

It is an arithmetic number, because the mean of its divisors is an integer number (2872405800).

Almost surely, 2^212766672591 is an apocalyptic number.

212766672591 is a deficient number, since it is larger than the sum of its proper divisors (154901269809).

212766672591 is a wasteful number, since it uses less digits than its factorization.

212766672591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1200 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The spelling of 212766672591 in words is "two hundred twelve billion, seven hundred sixty-six million, six hundred seventy-two thousand, five hundred ninety-one".