51555145352551 has 8 divisors (see below), whose sum is σ = 53259057434624. Its totient is φ = 49853785950360.

The previous prime is 51555145352533. The next prime is 51555145352617. The reversal of 51555145352551 is 15525354155515.

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

It is not a de Polignac number, because 51555145352551 - 2¹⁹ = 51555144828263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555145352651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638128911 + ... + 638209696.

It is an arithmetic number, because the mean of its divisors is an integer number (6657382179328).

Almost surely, 2^{51555145352551} is an apocalyptic number.

51555145352551 is a deficient number, since it is larger than the sum of its proper divisors (1703912082073).

51555145352551 is a wasteful number, since it uses less digits than its factorization.

51555145352551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276339941.

The product of its digits is 9375000, while the sum is 52.

The spelling of 51555145352551 in words is "fifty-one trillion, five hundred fifty-five billion, one hundred forty-five million, three hundred fifty-two thousand, five hundred fifty-one".