56503731552 has 144 divisors (see below), whose sum is σ = 157069871280. Its totient is φ = 17782861824.

The previous prime is 56503731463. The next prime is 56503731617. The reversal of 56503731552 is 25513730565.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10844724 + ... + 10849932.

It is an arithmetic number, because the mean of its divisors is an integer number (1090762995).

Almost surely, 2^56503731552 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 56503731552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78534935640).

56503731552 is an abundant number, since it is smaller than the sum of its proper divisors (100566139728).

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

56503731552 is a wasteful number, since it uses less digits than its factorization.

56503731552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573 (or 5546 counting only the distinct ones).

The product of its (nonzero) digits is 472500, while the sum is 42.

The spelling of 56503731552 in words is "fifty-six billion, five hundred three million, seven hundred thirty-one thousand, five hundred fifty-two".