51447700678748 has 72 divisors (see below), whose sum is σ = 104411769278544. Its totient is φ = 21993673676800.

The previous prime is 51447700678747. The next prime is 51447700678753. The reversal of 51447700678748 is 84787600774415.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51447700678747) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15985688 + ... + 18932448.

It is an arithmetic number, because the mean of its divisors is an integer number (1450163462202).

Almost surely, 2^{51447700678748} is an apocalyptic number.

It is an amenable number.

51447700678748 is an abundant number, since it is smaller than the sum of its proper divisors (52964068599796).

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

51447700678748 is a wasteful number, since it uses less digits than its factorization.

51447700678748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948183 (or 2948164 counting only the distinct ones).

The product of its (nonzero) digits is 295034880, while the sum is 68.

The spelling of 51447700678748 in words is "fifty-one trillion, four hundred forty-seven billion, seven hundred million, six hundred seventy-eight thousand, seven hundred forty-eight".