56542539621 has 8 divisors (see below), whose sum is σ = 77821990144. Its totient is φ = 36479057760.

The previous prime is 56542539593. The next prime is 56542539623. The reversal of 56542539621 is 12693524565.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56542539621 - 2¹¹ = 56542537573 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 (56542539623) 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 7 ways as a sum of consecutive naturals, for example, 303992056 + ... + 303992241.

It is an arithmetic number, because the mean of its divisors is an integer number (9727748768).

Almost surely, 2^56542539621 is an apocalyptic number.

It is an amenable number.

56542539621 is a deficient number, since it is larger than the sum of its proper divisors (21279450523).

56542539621 is a wasteful number, since it uses less digits than its factorization.

56542539621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607984331.

The product of its digits is 1944000, while the sum is 48.

The spelling of 56542539621 in words is "fifty-six billion, five hundred forty-two million, five hundred thirty-nine thousand, six hundred twenty-one".