51822064440 has 128 divisors (see below), whose sum is σ = 175572244800. Its totient is φ = 13592655360.

The previous prime is 51822064429. The next prime is 51822064457. The reversal of 51822064440 is 4446022815.

51822064440 is a `hidden beast` number, since 5 + 1 + 8 + 2 + 2 + 0 + 644 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51822064395 and 51822064404.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 327427 + ... + 459186.

Almost surely, 2^51822064440 is an apocalyptic number.

It is an amenable number.

51822064440 is an abundant number, since it is smaller than the sum of its proper divisors (123750180360).

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

51822064440 is a wasteful number, since it uses less digits than its factorization.

51822064440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786694 (or 786684 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

It can be divided in two parts, 518220 and 64440, that added together give a triangular number (582660 = T₁₀₇₉).

The spelling of 51822064440 in words is "fifty-one billion, eight hundred twenty-two million, sixty-four thousand, four hundred forty".