51006061055501 has 32 divisors (see below), whose sum is σ = 54560919029760. Its totient is φ = 47595841884864.

The previous prime is 51006061055491. The next prime is 51006061055549. The reversal of 51006061055501 is 10555016060015.

It is a cyclic number.

It is not a de Polignac number, because 51006061055501 - 2¹⁸ = 51006060793357 is a prime.

It is a super-2 number, since 2×51006061055501² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51006061055591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156920990 + ... + 157245696.

It is an arithmetic number, because the mean of its divisors is an integer number (1705028719680).

Almost surely, 2^{51006061055501} is an apocalyptic number.

It is an amenable number.

51006061055501 is a deficient number, since it is larger than the sum of its proper divisors (3554857974259).

51006061055501 is a wasteful number, since it uses less digits than its factorization.

51006061055501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326105.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51006061055501 in words is "fifty-one trillion, six billion, sixty-one million, fifty-five thousand, five hundred one".