56501515501 has 4 divisors (see below), whose sum is σ = 56502039904. Its totient is φ = 56500991100.

The previous prime is 56501515481. The next prime is 56501515507. The reversal of 56501515501 is 10551510565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 56501515501 - 2¹⁵ = 56501482733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56501515507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34905 + ... + 337966.

It is an arithmetic number, because the mean of its divisors is an integer number (14125509976).

Almost surely, 2^56501515501 is an apocalyptic number.

It is an amenable number.

56501515501 is a deficient number, since it is larger than the sum of its proper divisors (524403).

56501515501 is a wasteful number, since it uses less digits than its factorization.

56501515501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524402.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 56501515501 in words is "fifty-six billion, five hundred one million, five hundred fifteen thousand, five hundred one".