51111005160609 has 6 divisors (see below), whose sum is σ = 73827007454226. Its totient is φ = 34074003440400.

The previous prime is 51111005160583. The next prime is 51111005160619. The reversal of 51111005160609 is 90606150011115.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 44397967712400 + 6713037448209 = 6663180^2 + 2590953^2 .

It is not a de Polignac number, because 51111005160609 - 2¹⁵ = 51111005127841 is a prime.

It is a super-2 number, since 2×51111005160609² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51111005160619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2839500286692 + ... + 2839500286709.

It is an arithmetic number, because the mean of its divisors is an integer number (12304501242371).

Almost surely, 2^{51111005160609} is an apocalyptic number.

It is an amenable number.

51111005160609 is a deficient number, since it is larger than the sum of its proper divisors (22716002293617).

51111005160609 is a wasteful number, since it uses less digits than its factorization.

51111005160609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679000573407 (or 5679000573404 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 36.

The spelling of 51111005160609 in words is "fifty-one trillion, one hundred eleven billion, five million, one hundred sixty thousand, six hundred nine".