612668359821 has 16 divisors (see below), whose sum is σ = 934219457024. Its totient is φ = 349860114864.

The previous prime is 612668359819. The next prime is 612668359829. The reversal of 612668359821 is 128953866216.

It is not a de Polignac number, because 612668359821 - 2¹ = 612668359819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612668359829) 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, 9805231 + ... + 9867516.

It is an arithmetic number, because the mean of its divisors is an integer number (58388716064).

Almost surely, 2^612668359821 is an apocalyptic number.

It is an amenable number.

612668359821 is a deficient number, since it is larger than the sum of its proper divisors (321551097203).

612668359821 is a wasteful number, since it uses less digits than its factorization.

612668359821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19674240.

The product of its digits is 7464960, while the sum is 57.

The spelling of 612668359821 in words is "six hundred twelve billion, six hundred sixty-eight million, three hundred fifty-nine thousand, eight hundred twenty-one".