212361756746 has 4 divisors (see below), whose sum is σ = 318542635122. Its totient is φ = 106180878372.

The previous prime is 212361756727. The next prime is 212361756791. The reversal of 212361756746 is 647657163212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 180119604025 + 32242152721 = 424405^2 + 179561^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212361756694 and 212361756703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53090439185 + ... + 53090439188.

Almost surely, 2^212361756746 is an apocalyptic number.

212361756746 is a deficient number, since it is larger than the sum of its proper divisors (106180878376).

212361756746 is a wasteful number, since it uses less digits than its factorization.

212361756746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106180878375.

The product of its digits is 2540160, while the sum is 50.

The spelling of 212361756746 in words is "two hundred twelve billion, three hundred sixty-one million, seven hundred fifty-six thousand, seven hundred forty-six".