51972154845 has 16 divisors (see below), whose sum is σ = 89552020992. Its totient is φ = 25586291520.

The previous prime is 51972154823. The next prime is 51972154847. The reversal of 51972154845 is 54845127915.

It is not a de Polignac number, because 51972154845 - 2¹⁴ = 51972138461 is a prime.

It is a super-2 number, since 2×51972154845² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51972154847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133261741 + ... + 133262130.

It is an arithmetic number, because the mean of its divisors is an integer number (5597001312).

Almost surely, 2^51972154845 is an apocalyptic number.

It is an amenable number.

51972154845 is a deficient number, since it is larger than the sum of its proper divisors (37579866147).

51972154845 is a wasteful number, since it uses less digits than its factorization.

51972154845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266523892.

The product of its digits is 2016000, while the sum is 51.

The spelling of 51972154845 in words is "fifty-one billion, nine hundred seventy-two million, one hundred fifty-four thousand, eight hundred forty-five".