28625497251839 has 4 divisors (see below), whose sum is σ = 28625567704824. Its totient is φ = 28625426798856.

The previous prime is 28625497251829. The next prime is 28625497251847. The reversal of 28625497251839 is 93815279452682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28625497251839 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 (28625497251829) 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, 34613477 + ... + 35430830.

It is an arithmetic number, because the mean of its divisors is an integer number (7156391926206).

Almost surely, 2^{28625497251839} is an apocalyptic number.

28625497251839 is a deficient number, since it is larger than the sum of its proper divisors (70452985).

28625497251839 is an equidigital number, since it uses as much as digits as its factorization.

28625497251839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70452984.

The product of its digits is 522547200, while the sum is 71.

The spelling of 28625497251839 in words is "twenty-eight trillion, six hundred twenty-five billion, four hundred ninety-seven million, two hundred fifty-one thousand, eight hundred thirty-nine".