51375172772 has 96 divisors (see below), whose sum is σ = 117424097280. Its totient is φ = 19070853120.

The previous prime is 51375172727. The next prime is 51375172787. The reversal of 51375172772 is 27727157315.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1806479 + ... + 1834697.

It is an arithmetic number, because the mean of its divisors is an integer number (1223167680).

Almost surely, 2^51375172772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51375172772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58712048640).

51375172772 is an abundant number, since it is smaller than the sum of its proper divisors (66048924508).

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

51375172772 is a wasteful number, since it uses less digits than its factorization.

51375172772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28521 (or 28519 counting only the distinct ones).

The product of its digits is 720300, while the sum is 47.

The spelling of 51375172772 in words is "fifty-one billion, three hundred seventy-five million, one hundred seventy-two thousand, seven hundred seventy-two".