51346515078 has 36 divisors (see below), whose sum is σ = 117115645140. Its totient is φ = 16213365648.

The previous prime is 51346515023. The next prime is 51346515079. The reversal of 51346515078 is 87051564315.

51346515078 is a `hidden beast` number, since 5 + 134 + 6 + 5 + 1 + 507 + 8 = 666.

It is a super-2 number, since 2×51346515078² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51346515079) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4184400 + ... + 4196652.

It is an arithmetic number, because the mean of its divisors is an integer number (3253212365).

Almost surely, 2^51346515078 is an apocalyptic number.

51346515078 is an abundant number, since it is smaller than the sum of its proper divisors (65769130062).

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

51346515078 is an equidigital number, since it uses as much as digits as its factorization.

51346515078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24533 (or 12277 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 51346515078 in words is "fifty-one billion, three hundred forty-six million, five hundred fifteen thousand, seventy-eight".