51656666150497 has 8 divisors (see below), whose sum is σ = 51840794518632. Its totient is φ = 51472539888000.

The previous prime is 51656666150471. The next prime is 51656666150503. The reversal of 51656666150497 is 79405166665615.

It can be written as a sum of positive squares in 4 ways, for example, as 17509640976 + 51639156509521 = 132324^2 + 7186039^2 .

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-51656666150497 is a prime.

It is a super-2 number, since 2×51656666150497² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51656666150417) 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, 61713663 + ... + 62545099.

It is an arithmetic number, because the mean of its divisors is an integer number (6480099314829).

Almost surely, 2^{51656666150497} is an apocalyptic number.

It is an amenable number.

51656666150497 is a deficient number, since it is larger than the sum of its proper divisors (184128368135).

51656666150497 is a wasteful number, since it uses less digits than its factorization.

51656666150497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052819.

The product of its (nonzero) digits is 244944000, while the sum is 67.

The spelling of 51656666150497 in words is "fifty-one trillion, six hundred fifty-six billion, six hundred sixty-six million, one hundred fifty thousand, four hundred ninety-seven".