51152533645 has 4 divisors (see below), whose sum is σ = 61383040380. Its totient is φ = 40922026912.

The previous prime is 51152533637. The next prime is 51152533667. The reversal of 51152533645 is 54633525115.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12121789801 + 39030743844 = 110099^2 + 197562^2 .

It is a cyclic number.

It is not a de Polignac number, because 51152533645 - 2³ = 51152533637 is a prime.

It is a super-3 number, since 3×51152533645³ (a number of 33 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 51152533598 and 51152533607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5115253360 + ... + 5115253369.

It is an arithmetic number, because the mean of its divisors is an integer number (15345760095).

Almost surely, 2^51152533645 is an apocalyptic number.

It is an amenable number.

51152533645 is a deficient number, since it is larger than the sum of its proper divisors (10230506735).

51152533645 is a wasteful number, since it uses less digits than its factorization.

51152533645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10230506734.

The product of its digits is 270000, while the sum is 40.

The spelling of 51152533645 in words is "fifty-one billion, one hundred fifty-two million, five hundred thirty-three thousand, six hundred forty-five".