51174715645 has 8 divisors (see below), whose sum is σ = 62099655480. Its totient is φ = 40479774720.

The previous prime is 51174715621. The next prime is 51174715673. The reversal of 51174715645 is 54651747115.

51174715645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12577398201 + 38597317444 = 112149^2 + 196462^2 .

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

It is not a de Polignac number, because 51174715645 - 2¹⁹ = 51174191357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51174715595 and 51174715604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57499236 + ... + 57500125.

It is an arithmetic number, because the mean of its divisors is an integer number (7762456935).

Almost surely, 2^51174715645 is an apocalyptic number.

It is an amenable number.

51174715645 is a deficient number, since it is larger than the sum of its proper divisors (10924939835).

51174715645 is a wasteful number, since it uses less digits than its factorization.

51174715645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114999455.

The product of its digits is 588000, while the sum is 46.

The spelling of 51174715645 in words is "fifty-one billion, one hundred seventy-four million, seven hundred fifteen thousand, six hundred forty-five".