51085325640 has 32 divisors (see below), whose sum is σ = 153255977280. Its totient is φ = 13622753472.

The previous prime is 51085325617. The next prime is 51085325677. The reversal of 51085325640 is 4652358015.

51085325640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212855404 + ... + 212855643.

It is an arithmetic number, because the mean of its divisors is an integer number (4789249290).

Almost surely, 2^51085325640 is an apocalyptic number.

It is an amenable number.

51085325640 is an abundant number, since it is smaller than the sum of its proper divisors (102170651640).

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

51085325640 is a wasteful number, since it uses less digits than its factorization.

51085325640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425711061 (or 425711057 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 51085325640 in words is "fifty-one billion, eighty-five million, three hundred twenty-five thousand, six hundred forty".