54637681 has 4 divisors (see below), whose sum is σ = 62443072. Its totient is φ = 46832292.

The previous prime is 54637679. The next prime is 54637691. The reversal of 54637681 is 18673645.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 54637681 - 2¹ = 54637679 is a prime.

It is a super-2 number, since 2×54637681² = 5970552370115522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54637691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3902685 + ... + 3902698.

It is an arithmetic number, because the mean of its divisors is an integer number (15610768).

Almost surely, 2^54637681 is an apocalyptic number.

It is an amenable number.

54637681 is a deficient number, since it is larger than the sum of its proper divisors (7805391).

54637681 is an equidigital number, since it uses as much as digits as its factorization.

54637681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7805390.

The product of its digits is 120960, while the sum is 40.

The square root of 54637681 is about 7391.7305822114. The cubic root of 54637681 is about 379.4583256470.

The spelling of 54637681 in words is "fifty-four million, six hundred thirty-seven thousand, six hundred eighty-one".