212661600476 has 24 divisors (see below), whose sum is σ = 403844766864. Its totient is φ = 97402256640.

The previous prime is 212661600449. The next prime is 212661600493. The reversal of 212661600476 is 674006166212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15602525 + ... + 15616148.

It is an arithmetic number, because the mean of its divisors is an integer number (16826865286).

Almost surely, 2^212661600476 is an apocalyptic number.

212661600476 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

212661600476 is a deficient number, since it is larger than the sum of its proper divisors (191183166388).

212661600476 is a wasteful number, since it uses less digits than its factorization.

212661600476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31218821 (or 31218819 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

Adding to 212661600476 its reverse (674006166212), we get a palindrome (886667766688).

The spelling of 212661600476 in words is "two hundred twelve billion, six hundred sixty-one million, six hundred thousand, four hundred seventy-six".