51229845494784 has 704 divisors, whose sum is σ = 169907419392000. Its totient is φ = 15117200916480.

The previous prime is 51229845494731. The next prime is 51229845494887. The reversal of 51229845494784 is 48749454892215.

51229845494784 is a `hidden beast` number, since 5 + 1 + 2 + 2 + 9 + 8 + 4 + 549 + 4 + 78 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1753891572 + ... + 1753920780.

Almost surely, 2^{51229845494784} is an apocalyptic number.

51229845494784 is a gapful number since it is divisible by the number (54) 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 51229845494784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84953709696000).

51229845494784 is an abundant number, since it is smaller than the sum of its proper divisors (118677573897216).

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

51229845494784 is a wasteful number, since it uses less digits than its factorization.

51229845494784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29401 (or 29377 counting only the distinct ones).

The product of its digits is 928972800, while the sum is 72.

The spelling of 51229845494784 in words is "fifty-one trillion, two hundred twenty-nine billion, eight hundred forty-five million, four hundred ninety-four thousand, seven hundred eighty-four".