51111505361 has 8 divisors (see below), whose sum is σ = 58414679040. Its totient is φ = 43808714208.

The previous prime is 51111505331. The next prime is 51111505439. The reversal of 51111505361 is 16350511115.

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

It is a de Polignac number, because none of the positive numbers 2^k-51111505361 is a prime.

It is a super-2 number, since 2×51111505361² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51111505331) 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 7 ways as a sum of consecutive naturals, for example, 299600 + ... + 438158.

It is an arithmetic number, because the mean of its divisors is an integer number (7301834880).

Almost surely, 2^51111505361 is an apocalyptic number.

It is an amenable number.

51111505361 is a deficient number, since it is larger than the sum of its proper divisors (7303173679).

51111505361 is a wasteful number, since it uses less digits than its factorization.

51111505361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191263.

The product of its (nonzero) digits is 2250, while the sum is 29.

The spelling of 51111505361 in words is "fifty-one billion, one hundred eleven million, five hundred five thousand, three hundred sixty-one".