51669453559416 has 256 divisors, whose sum is σ = 161721391104000. Its totient is φ = 13364575564800.

The previous prime is 51669453559351. The next prime is 51669453559429. The reversal of 51669453559416 is 61495535496615.

It is a super-2 number, since 2×51669453559416² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 602846821 + ... + 602932523.

It is an arithmetic number, because the mean of its divisors is an integer number (631724184000).

Almost surely, 2^{51669453559416} is an apocalyptic number.

51669453559416 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51669453559416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80860695552000).

51669453559416 is an abundant number, since it is smaller than the sum of its proper divisors (110051937544584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51669453559416 is a wasteful number, since it uses less digits than its factorization.

51669453559416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87090 (or 87086 counting only the distinct ones).

The product of its digits is 524880000, while the sum is 69.

The spelling of 51669453559416 in words is "fifty-one trillion, six hundred sixty-nine billion, four hundred fifty-three million, five hundred fifty-nine thousand, four hundred sixteen".