51625327591 has 4 divisors (see below), whose sum is σ = 51788183832. Its totient is φ = 51462471352.

The previous prime is 51625327583. The next prime is 51625327679. The reversal of 51625327591 is 19572352615.

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 51625327591 - 2³ = 51625327583 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 (51625327891) 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, 81427645 + ... + 81428278.

It is an arithmetic number, because the mean of its divisors is an integer number (12947045958).

Almost surely, 2^51625327591 is an apocalyptic number.

51625327591 is a deficient number, since it is larger than the sum of its proper divisors (162856241).

51625327591 is a wasteful number, since it uses less digits than its factorization.

51625327591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162856240.

The product of its digits is 567000, while the sum is 46.

The spelling of 51625327591 in words is "fifty-one billion, six hundred twenty-five million, three hundred twenty-seven thousand, five hundred ninety-one".