51979745345 has 8 divisors (see below), whose sum is σ = 68046212160. Its totient is φ = 37803451120.

The previous prime is 51979745327. The next prime is 51979745383. The reversal of 51979745345 is 54354797915.

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

It is not a de Polignac number, because 51979745345 - 2¹² = 51979741249 is a prime.

It is a super-2 number, since 2×51979745345² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 472543085 + ... + 472543194.

It is an arithmetic number, because the mean of its divisors is an integer number (8505776520).

Almost surely, 2^51979745345 is an apocalyptic number.

51979745345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51979745345 is a deficient number, since it is larger than the sum of its proper divisors (16066466815).

51979745345 is a wasteful number, since it uses less digits than its factorization.

51979745345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945086295.

The product of its digits is 23814000, while the sum is 59.

The spelling of 51979745345 in words is "fifty-one billion, nine hundred seventy-nine million, seven hundred forty-five thousand, three hundred forty-five".