51672156065 has 8 divisors (see below), whose sum is σ = 64144745640. Its totient is φ = 39912285952.

The previous prime is 51672156031. The next prime is 51672156121. The reversal of 51672156065 is 56065127615.

It can be written as a sum of positive squares in 4 ways, for example, as 6968242576 + 44703913489 = 83476^2 + 211433^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51672156065 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178179704 + ... + 178179993.

It is an arithmetic number, because the mean of its divisors is an integer number (8018093205).

Almost surely, 2^51672156065 is an apocalyptic number.

It is an amenable number.

51672156065 is a deficient number, since it is larger than the sum of its proper divisors (12472589575).

51672156065 is a wasteful number, since it uses less digits than its factorization.

51672156065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356359731.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 51672156065 in words is "fifty-one billion, six hundred seventy-two million, one hundred fifty-six thousand, sixty-five".