51394746940480 has 224 divisors, whose sum is σ = 128989433664000. Its totient is φ = 19478207766528.

The previous prime is 51394746940457. The next prime is 51394746940487. The reversal of 51394746940480 is 8404964749315.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (51394746940487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114541849 + ... + 114989671.

It is an arithmetic number, because the mean of its divisors is an integer number (575845686000).

Almost surely, 2^{51394746940480} 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 51394746940480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64494716832000).

51394746940480 is an abundant number, since it is smaller than the sum of its proper divisors (77594686723520).

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

51394746940480 is a wasteful number, since it uses less digits than its factorization.

51394746940480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448101 (or 448091 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 64.

The spelling of 51394746940480 in words is "fifty-one trillion, three hundred ninety-four billion, seven hundred forty-six million, nine hundred forty thousand, four hundred eighty".