51662477244 has 96 divisors (see below), whose sum is σ = 142347534336. Its totient is φ = 14270811840.

The previous prime is 51662477239. The next prime is 51662477287. The reversal of 51662477244 is 44277426615.

It is a junction number, because it is equal to n+sod(n) for n = 51662477193 and 51662477202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2863219 + ... + 2881205.

It is an arithmetic number, because the mean of its divisors is an integer number (1482786816).

Almost surely, 2^51662477244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51662477244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71173767168).

51662477244 is an abundant number, since it is smaller than the sum of its proper divisors (90685057092).

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

51662477244 is a wasteful number, since it uses less digits than its factorization.

51662477244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19135 (or 19133 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 48.

It can be divided in two parts, 51662 and 477244, that added together give a triangular number (528906 = T₁₀₂₈).

The spelling of 51662477244 in words is "fifty-one billion, six hundred sixty-two million, four hundred seventy-seven thousand, two hundred forty-four".