51416343191 has 4 divisors (see below), whose sum is σ = 52670400384. Its totient is φ = 50162286000.

The previous prime is 51416343157. The next prime is 51416343193. The reversal of 51416343191 is 19134361415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51416343191 - 2⁶ = 51416343127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51416343193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627028535 + ... + 627028616.

It is an arithmetic number, because the mean of its divisors is an integer number (13167600096).

Almost surely, 2^51416343191 is an apocalyptic number.

51416343191 is a deficient number, since it is larger than the sum of its proper divisors (1254057193).

51416343191 is a wasteful number, since it uses less digits than its factorization.

51416343191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254057192.

The product of its digits is 38880, while the sum is 38.

The spelling of 51416343191 in words is "fifty-one billion, four hundred sixteen million, three hundred forty-three thousand, one hundred ninety-one".