51005605611 has 8 divisors (see below), whose sum is σ = 68034460624. Its totient is φ = 33990243840.

The previous prime is 51005605603. The next prime is 51005605613. The reversal of 51005605611 is 11650650015.

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

It is not a de Polignac number, because 51005605611 - 2³ = 51005605603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51005605613) 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, 3364486 + ... + 3379611.

It is an arithmetic number, because the mean of its divisors is an integer number (8504307578).

Almost surely, 2^51005605611 is an apocalyptic number.

51005605611 is a deficient number, since it is larger than the sum of its proper divisors (17028855013).

51005605611 is a wasteful number, since it uses less digits than its factorization.

51005605611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746621.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51005605611 in words is "fifty-one billion, five million, six hundred five thousand, six hundred eleven".