212667528644 has 12 divisors (see below), whose sum is σ = 372175891500. Its totient is φ = 106331559648.

The previous prime is 212667528617. The next prime is 212667528677. The reversal of 212667528644 is 446825766212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 149219964100 + 63447564544 = 386290^2 + 251888^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323699 + ... + 728090.

It is an arithmetic number, because the mean of its divisors is an integer number (31014657625).

Almost surely, 2^212667528644 is an apocalyptic number.

It is an amenable number.

212667528644 is a deficient number, since it is larger than the sum of its proper divisors (159508362856).

212667528644 is a wasteful number, since it uses less digits than its factorization.

212667528644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102342 (or 1102340 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 53.

The spelling of 212667528644 in words is "two hundred twelve billion, six hundred sixty-seven million, five hundred twenty-eight thousand, six hundred forty-four".