51010101665511 has 8 divisors (see below), whose sum is σ = 68014137475440. Its totient is φ = 34006400149632.

The previous prime is 51010101665473. The next prime is 51010101665513. The reversal of 51010101665511 is 11556610101015.

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

It is not a de Polignac number, because 51010101665511 - 2¹¹ = 51010101663463 is a prime.

It is a super-2 number, since 2×51010101665511² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51010101665513) 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, 83217250 + ... + 83827983.

It is an arithmetic number, because the mean of its divisors is an integer number (8501767184430).

Almost surely, 2^{51010101665511} is an apocalyptic number.

51010101665511 is a deficient number, since it is larger than the sum of its proper divisors (17004035809929).

51010101665511 is a wasteful number, since it uses less digits than its factorization.

51010101665511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167147025.

The product of its (nonzero) digits is 4500, while the sum is 33.

Adding to 51010101665511 its reverse (11556610101015), we get a palindrome (62566711766526).

The spelling of 51010101665511 in words is "fifty-one trillion, ten billion, one hundred one million, six hundred sixty-five thousand, five hundred eleven".