51472261992 has 32 divisors (see below), whose sum is σ = 132158512800. Its totient is φ = 16693706304.

The previous prime is 51472261963. The next prime is 51472262033. The reversal of 51472261992 is 29916227415.

It is a happy 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, 28981242 + ... + 28983017.

It is an arithmetic number, because the mean of its divisors is an integer number (4129953525).

Almost surely, 2^51472261992 is an apocalyptic number.

It is an amenable number.

51472261992 is an abundant number, since it is smaller than the sum of its proper divisors (80686250808).

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

51472261992 is a wasteful number, since it uses less digits than its factorization.

51472261992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57964305 (or 57964301 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The spelling of 51472261992 in words is "fifty-one billion, four hundred seventy-two million, two hundred sixty-one thousand, nine hundred ninety-two".