51121648372 has 48 divisors (see below), whose sum is σ = 93701986560. Its totient is φ = 24358194432.

The previous prime is 51121648337. The next prime is 51121648373. The reversal of 51121648372 is 27384612115.

It is a super-2 number, since 2×51121648372² (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 (51121648373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45279904 + ... + 45281032.

It is an arithmetic number, because the mean of its divisors is an integer number (1952124720).

Almost surely, 2^51121648372 is an apocalyptic number.

It is an amenable number.

51121648372 is a deficient number, since it is larger than the sum of its proper divisors (42580338188).

51121648372 is a wasteful number, since it uses less digits than its factorization.

51121648372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560 (or 2558 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The spelling of 51121648372 in words is "fifty-one billion, one hundred twenty-one million, six hundred forty-eight thousand, three hundred seventy-two".