51717943407078 has 48 divisors (see below), whose sum is σ = 122202735520320. Its totient is φ = 15711780269952.

The previous prime is 51717943407073. The next prime is 51717943407083. The reversal of 51717943407078 is 87070434971715.

It is a happy number.

51717943407078 is a `hidden beast` number, since 5 + 1 + 71 + 7 + 94 + 3 + 407 + 0 + 78 = 666.

It is an interprime number because it is at equal distance from previous prime (51717943407073) and next prime (51717943407083).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51717943407073) 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, 1398822351 + ... + 1398859322.

It is an arithmetic number, because the mean of its divisors is an integer number (2545890323340).

Almost surely, 2^{51717943407078} is an apocalyptic number.

51717943407078 is an abundant number, since it is smaller than the sum of its proper divisors (70484792113242).

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

51717943407078 is a wasteful number, since it uses less digits than its factorization.

51717943407078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797681773 (or 2797681770 counting only the distinct ones).

The product of its (nonzero) digits is 41489280, while the sum is 63.

The spelling of 51717943407078 in words is "fifty-one trillion, seven hundred seventeen billion, nine hundred forty-three million, four hundred seven thousand, seventy-eight".