51203544540 has 96 divisors (see below), whose sum is σ = 146965190400. Its totient is φ = 13312320000.

The previous prime is 51203544527. The next prime is 51203544577. The reversal of 51203544540 is 4544530215.

It is a congruent number.

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, 4173415 + ... + 4185665.

It is an arithmetic number, because the mean of its divisors is an integer number (1530887400).

Almost surely, 2^51203544540 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 51203544540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73482595200).

51203544540 is an abundant number, since it is smaller than the sum of its proper divisors (95761645860).

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

51203544540 is a wasteful number, since it uses less digits than its factorization.

51203544540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14003 (or 14001 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 51203544540 in words is "fifty-one billion, two hundred three million, five hundred forty-four thousand, five hundred forty".