51278451312 has 40 divisors (see below), whose sum is σ = 144512000640. Its totient is φ = 15538924480.

The previous prime is 51278451307. The next prime is 51278451317. The reversal of 51278451312 is 21315487215.

51278451312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51278451307) and next prime (51278451317).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51278451317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48558612 + ... + 48559667.

It is an arithmetic number, because the mean of its divisors is an integer number (3612800016).

Almost surely, 2^51278451312 is an apocalyptic number.

It is an amenable number.

51278451312 is an abundant number, since it is smaller than the sum of its proper divisors (93233549328).

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

51278451312 is a wasteful number, since it uses less digits than its factorization.

51278451312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97118301 (or 97118295 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The spelling of 51278451312 in words is "fifty-one billion, two hundred seventy-eight million, four hundred fifty-one thousand, three hundred twelve".