610644996921 has 16 divisors (see below), whose sum is σ = 833368608000. Its totient is φ = 397547609088.

The previous prime is 610644996919. The next prime is 610644996937. The reversal of 610644996921 is 129699446016.

610644996921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 610644996921 - 2¹ = 610644996919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (610644991921) 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, 4759426 + ... + 4886043.

It is an arithmetic number, because the mean of its divisors is an integer number (52085538000).

Almost surely, 2^610644996921 is an apocalyptic number.

It is an amenable number.

610644996921 is a deficient number, since it is larger than the sum of its proper divisors (222723611079).

610644996921 is a wasteful number, since it uses less digits than its factorization.

610644996921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9645968.

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 610644996921 in words is "six hundred ten billion, six hundred forty-four million, nine hundred ninety-six thousand, nine hundred twenty-one".