51221606604596 has 6 divisors (see below), whose sum is σ = 89637811558050. Its totient is φ = 25610803302296.

The previous prime is 51221606604587. The next prime is 51221606604667. The reversal of 51221606604596 is 69540660612215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48370439272996 + 2851167331600 = 6954886^2 + 1688540^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402700825571 + ... + 6402700825578.

It is an arithmetic number, because the mean of its divisors is an integer number (14939635259675).

Almost surely, 2^{51221606604596} is an apocalyptic number.

It is an amenable number.

51221606604596 is a deficient number, since it is larger than the sum of its proper divisors (38416204953454).

51221606604596 is a wasteful number, since it uses less digits than its factorization.

51221606604596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805401651153 (or 12805401651151 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 51221606604596 in words is "fifty-one trillion, two hundred twenty-one billion, six hundred six million, six hundred four thousand, five hundred ninety-six".