51563205553642 has 8 divisors (see below), whose sum is σ = 77355894034116. Its totient is φ = 25777907542272.

The previous prime is 51563205553603. The next prime is 51563205553709. The reversal of 51563205553642 is 24635550236515.

It can be written as a sum of positive squares in 2 ways, for example, as 38687889961681 + 12875315591961 = 6219959^2 + 3588219^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 51563205553642.

It is an unprimeable number.

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, 1847599833 + ... + 1847627740.

Almost surely, 2^{51563205553642} is an apocalyptic number.

51563205553642 is a deficient number, since it is larger than the sum of its proper divisors (25792688480474).

51563205553642 is a wasteful number, since it uses less digits than its factorization.

51563205553642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695234552.

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

The spelling of 51563205553642 in words is "fifty-one trillion, five hundred sixty-three billion, two hundred five million, five hundred fifty-three thousand, six hundred forty-two".