51001061000061 has 12 divisors (see below), whose sum is σ = 70265769789696. Its totient is φ = 32903910320760.

The previous prime is 51001061000051. The next prime is 51001061000069. The reversal of 51001061000061 is 16000016010015.

It is not a de Polignac number, because 51001061000061 - 2¹⁸ = 51001060737917 is a prime.

It is a super-2 number, since 2×51001061000061² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001061000069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8845134301 + ... + 8845140066.

It is an arithmetic number, because the mean of its divisors is an integer number (5855480815808).

Almost surely, 2^{51001061000061} is an apocalyptic number.

It is an amenable number.

51001061000061 is a deficient number, since it is larger than the sum of its proper divisors (19264708789635).

51001061000061 is a wasteful number, since it uses less digits than its factorization.

51001061000061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17690274432 (or 17690274401 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

Adding to 51001061000061 its reverse (16000016010015), we get a palindrome (67001077010076).

The spelling of 51001061000061 in words is "fifty-one trillion, one billion, sixty-one million, sixty-one", and thus it is an aban number and an uban number.