51556050191 has 8 divisors (see below), whose sum is σ = 51730399968. Its totient is φ = 51381756000.

The previous prime is 51556050113. The next prime is 51556050193. The reversal of 51556050191 is 19105065515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51556050191 is a prime.

It is a super-2 number, since 2×51556050191² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51556050193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2771381 + ... + 2789921.

It is an arithmetic number, because the mean of its divisors is an integer number (6466299996).

Almost surely, 2^51556050191 is an apocalyptic number.

51556050191 is a deficient number, since it is larger than the sum of its proper divisors (174349777).

51556050191 is a wasteful number, since it uses less digits than its factorization.

51556050191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27793.

The product of its (nonzero) digits is 33750, while the sum is 38.

The spelling of 51556050191 in words is "fifty-one billion, five hundred fifty-six million, fifty thousand, one hundred ninety-one".