28154653837 has 4 divisors (see below), whose sum is σ = 28191651516. Its totient is φ = 28117656160.

The previous prime is 28154653823. The next prime is 28154653843. The reversal of 28154653837 is 73835645182.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13067690596 + 15086963241 = 114314^2 + 122829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28154653837 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 (28154653847) 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, 18497698 + ... + 18499219.

It is an arithmetic number, because the mean of its divisors is an integer number (7047912879).

Almost surely, 2^28154653837 is an apocalyptic number.

It is an amenable number.

28154653837 is a deficient number, since it is larger than the sum of its proper divisors (36997679).

28154653837 is an equidigital number, since it uses as much as digits as its factorization.

28154653837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36997678.

The product of its digits is 4838400, while the sum is 52.

The spelling of 28154653837 in words is "twenty-eight billion, one hundred fifty-four million, six hundred fifty-three thousand, eight hundred thirty-seven".