51001051605 has 32 divisors (see below), whose sum is σ = 93355296768. Its totient is φ = 23290708800.

The previous prime is 51001051597. The next prime is 51001051609. The reversal of 51001051605 is 50615010015.

It is not a de Polignac number, because 51001051605 - 2³ = 51001051597 is a prime.

It is a super-3 number, since 3×51001051605³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001051609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148161 + ... + 352070.

It is an arithmetic number, because the mean of its divisors is an integer number (2917353024).

Almost surely, 2^51001051605 is an apocalyptic number.

It is an amenable number.

51001051605 is a deficient number, since it is larger than the sum of its proper divisors (42354245163).

51001051605 is a wasteful number, since it uses less digits than its factorization.

51001051605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501217.

The product of its (nonzero) digits is 750, while the sum is 24.

The spelling of 51001051605 in words is "fifty-one billion, one million, fifty-one thousand, six hundred five".