51120602609 has 8 divisors (see below), whose sum is σ = 51227205480. Its totient is φ = 51014105856.

The previous prime is 51120602579. The next prime is 51120602651. The reversal of 51120602609 is 90620602115.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12128176384 + 38992426225 = 110128^2 + 197465^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51120602609 - 2²⁰ = 51119554033 is a prime.

It is a super-2 number, since 2×51120602609² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51120602509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977087 + ... + 1028075.

It is an arithmetic number, because the mean of its divisors is an integer number (6403400685).

Almost surely, 2^51120602609 is an apocalyptic number.

It is an amenable number.

51120602609 is a deficient number, since it is larger than the sum of its proper divisors (106602871).

51120602609 is a wasteful number, since it uses less digits than its factorization.

51120602609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53059.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 51120602609 in words is "fifty-one billion, one hundred twenty million, six hundred two thousand, six hundred nine".