51270978342 has 16 divisors (see below), whose sum is σ = 102920343552. Its totient is φ = 17027261640.

The previous prime is 51270978259. The next prime is 51270978371. The reversal of 51270978342 is 24387907215.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51270978291 and 51270978300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15764358 + ... + 15767609.

It is an arithmetic number, because the mean of its divisors is an integer number (6432521472).

Almost surely, 2^51270978342 is an apocalyptic number.

51270978342 is an abundant number, since it is smaller than the sum of its proper divisors (51649365210).

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

51270978342 is a wasteful number, since it uses less digits than its factorization.

51270978342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31532243.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 51270978342 in words is "fifty-one billion, two hundred seventy million, nine hundred seventy-eight thousand, three hundred forty-two".