612121575793 has 12 divisors (see below), whose sum is σ = 766833623220. Its totient is φ = 484315971552.

The previous prime is 612121575787. The next prime is 612121575797. The reversal of 612121575793 is 397575121216.

It can be written as a sum of positive squares in 2 ways, for example, as 258438023424 + 353683552369 = 508368^2 + 594713^2 .

It is not a de Polignac number, because 612121575793 - 2⁹ = 612121575281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (612121575797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480471558 + ... + 480472831.

It is an arithmetic number, because the mean of its divisors is an integer number (63902801935).

Almost surely, 2^612121575793 is an apocalyptic number.

It is an amenable number.

612121575793 is a deficient number, since it is larger than the sum of its proper divisors (154712047427).

612121575793 is a wasteful number, since it uses less digits than its factorization.

612121575793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960944416 (or 960944409 counting only the distinct ones).

The product of its digits is 793800, while the sum is 49.

The spelling of 612121575793 in words is "six hundred twelve billion, one hundred twenty-one million, five hundred seventy-five thousand, seven hundred ninety-three".