51148439976 has 64 divisors (see below), whose sum is σ = 130168811520. Its totient is φ = 16743985920.

The previous prime is 51148439941. The next prime is 51148439977. The reversal of 51148439976 is 67993484115.

It is a happy number.

51148439976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51148439977) 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, 929241 + ... + 982743.

It is an arithmetic number, because the mean of its divisors is an integer number (2033887680).

Almost surely, 2^51148439976 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 51148439976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65084405760).

51148439976 is an abundant number, since it is smaller than the sum of its proper divisors (79020371544).

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

51148439976 is a wasteful number, since it uses less digits than its factorization.

51148439976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54226 (or 54222 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 51148439976 in words is "fifty-one billion, one hundred forty-eight million, four hundred thirty-nine thousand, nine hundred seventy-six".