51645352056253 has 4 divisors (see below), whose sum is σ = 51647109507360. Its totient is φ = 51643594605148.

The previous prime is 51645352056241. The next prime is 51645352056283. The reversal of 51645352056253 is 35265025354615.

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 a cyclic number.

It is not a de Polignac number, because 51645352056253 - 2¹³ = 51645352048061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51645352056253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51645352056283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878681473 + ... + 878740246.

It is an arithmetic number, because the mean of its divisors is an integer number (12911777376840).

Almost surely, 2^{51645352056253} is an apocalyptic number.

It is an amenable number.

51645352056253 is a deficient number, since it is larger than the sum of its proper divisors (1757451107).

51645352056253 is a wasteful number, since it uses less digits than its factorization.

51645352056253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757451106.

The product of its (nonzero) digits is 16200000, while the sum is 52.

The spelling of 51645352056253 in words is "fifty-one trillion, six hundred forty-five billion, three hundred fifty-two million, fifty-six thousand, two hundred fifty-three".