6150661716221 has 16 divisors (see below), whose sum is σ = 6730825738560. Its totient is φ = 5574026465280.

The previous prime is 6150661716211. The next prime is 6150661716257. The reversal of 6150661716221 is 1226171660516.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6150661716221 - 2³⁴ = 6133481847037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6150661716211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3962435 + ... + 5291711.

It is an arithmetic number, because the mean of its divisors is an integer number (420676608660).

Almost surely, 2^{6150661716221} is an apocalyptic number.

It is an amenable number.

6150661716221 is a deficient number, since it is larger than the sum of its proper divisors (580164022339).

6150661716221 is a wasteful number, since it uses less digits than its factorization.

6150661716221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330604.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 6150661716221 in words is "six trillion, one hundred fifty billion, six hundred sixty-one million, seven hundred sixteen thousand, two hundred twenty-one".