51161473372 has 12 divisors (see below), whose sum is σ = 90793601136. Its totient is φ = 25220444480.

The previous prime is 51161473303. The next prime is 51161473381. The reversal of 51161473372 is 27337416115.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90072733 + ... + 90073300.

It is an arithmetic number, because the mean of its divisors is an integer number (7566133428).

Almost surely, 2^51161473372 is an apocalyptic number.

It is an amenable number.

51161473372 is a deficient number, since it is larger than the sum of its proper divisors (39632127764).

51161473372 is a wasteful number, since it uses less digits than its factorization.

51161473372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180146108 (or 180146106 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

Adding to 51161473372 its reverse (27337416115), we get a palindrome (78498889487).

The spelling of 51161473372 in words is "fifty-one billion, one hundred sixty-one million, four hundred seventy-three thousand, three hundred seventy-two".