51201853559920 has 160 divisors (see below), whose sum is σ = 136582746144768. Its totient is φ = 17486276865024.

The previous prime is 51201853559887. The next prime is 51201853559921. The reversal of 51201853559920 is 2995535810215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51201853559921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2375173782 + ... + 2375195338.

Almost surely, 2^{51201853559920} 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 51201853559920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68291373072384).

51201853559920 is an abundant number, since it is smaller than the sum of its proper divisors (85380892584848).

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

51201853559920 is a wasteful number, since it uses less digits than its factorization.

51201853559920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37967 (or 37961 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 55.

The spelling of 51201853559920 in words is "fifty-one trillion, two hundred one billion, eight hundred fifty-three million, five hundred fifty-nine thousand, nine hundred twenty".