51439325473900 has 144 divisors (see below), whose sum is σ = 137404627763200. Its totient is φ = 16277084524800.

The previous prime is 51439325473853. The next prime is 51439325473909. The reversal of 51439325473900 is 937452393415.

It is not an unprimeable number, because it can be changed into a prime (51439325473909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56615401 + ... + 57516799.

Almost surely, 2^{51439325473900} is an apocalyptic number.

51439325473900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51439325473900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68702313881600).

51439325473900 is an abundant number, since it is smaller than the sum of its proper divisors (85965302289300).

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

51439325473900 is a wasteful number, since it uses less digits than its factorization.

51439325473900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907704 (or 907697 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 55.

The spelling of 51439325473900 in words is "fifty-one trillion, four hundred thirty-nine billion, three hundred twenty-five million, four hundred seventy-three thousand, nine hundred".