612613831921 has 64 divisors (see below), whose sum is σ = 801464903680. Its totient is φ = 454705643520.

The previous prime is 612613831913. The next prime is 612613831927. The reversal of 612613831921 is 129138316216.

It is a cyclic number.

It is not a de Polignac number, because 612613831921 - 2³ = 612613831913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612613831927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79753201 + ... + 79760881.

It is an arithmetic number, because the mean of its divisors is an integer number (12522889120).

Almost surely, 2^612613831921 is an apocalyptic number.

It is an amenable number.

612613831921 is a deficient number, since it is larger than the sum of its proper divisors (188851071759).

612613831921 is a wasteful number, since it uses less digits than its factorization.

612613831921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8166.

The product of its digits is 93312, while the sum is 43.

The spelling of 612613831921 in words is "six hundred twelve billion, six hundred thirteen million, eight hundred thirty-one thousand, nine hundred twenty-one".