51725995473 has 4 divisors (see below), whose sum is σ = 68967993968. Its totient is φ = 34483996980.

The previous prime is 51725995463. The next prime is 51725995499. The reversal of 51725995473 is 37459952715.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51725995473 - 2⁴ = 51725995457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51725995403) 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, 8620999243 + ... + 8620999248.

It is an arithmetic number, because the mean of its divisors is an integer number (17241998492).

Almost surely, 2^51725995473 is an apocalyptic number.

It is an amenable number.

51725995473 is a deficient number, since it is larger than the sum of its proper divisors (17241998495).

51725995473 is a wasteful number, since it uses less digits than its factorization.

51725995473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17241998494.

The product of its digits is 11907000, while the sum is 57.

The spelling of 51725995473 in words is "fifty-one billion, seven hundred twenty-five million, nine hundred ninety-five thousand, four hundred seventy-three".