612121575794 has 4 divisors (see below), whose sum is σ = 918182363694. Its totient is φ = 306060787896.

The previous prime is 612121575787. The next prime is 612121575797. The reversal of 612121575794 is 497575121216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 422483100169 + 189638475625 = 649987^2 + 435475^2 .

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 153030393947 + ... + 153030393950.

Almost surely, 2^612121575794 is an apocalyptic number.

612121575794 is a deficient number, since it is larger than the sum of its proper divisors (306060787900).

612121575794 is a wasteful number, since it uses less digits than its factorization.

612121575794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306060787899.

The product of its digits is 1058400, while the sum is 50.

The spelling of 612121575794 in words is "six hundred twelve billion, one hundred twenty-one million, five hundred seventy-five thousand, seven hundred ninety-four".