51455524639973 has 4 divisors (see below), whose sum is σ = 54163710147360. Its totient is φ = 48747339132588.

The previous prime is 51455524639927. The next prime is 51455524639979. The reversal of 51455524639973 is 37993642555415.

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 51455524639973 - 2²² = 51455520445669 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 (51455524639979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354092753665 + ... + 1354092753702.

It is an arithmetic number, because the mean of its divisors is an integer number (13540927536840).

Almost surely, 2^{51455524639973} is an apocalyptic number.

It is an amenable number.

51455524639973 is a deficient number, since it is larger than the sum of its proper divisors (2708185507387).

51455524639973 is a wasteful number, since it uses less digits than its factorization.

51455524639973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708185507386.

The product of its digits is 612360000, while the sum is 68.

The spelling of 51455524639973 in words is "fifty-one trillion, four hundred fifty-five billion, five hundred twenty-four million, six hundred thirty-nine thousand, nine hundred seventy-three".