28977990125471 has 4 divisors (see below), whose sum is σ = 29594543106912. Its totient is φ = 28361437144032.

The previous prime is 28977990125449. The next prime is 28977990125479. The reversal of 28977990125471 is 17452109977982.

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

It is a cyclic number.

It is not a de Polignac number, because 28977990125471 - 2¹⁸ = 28977989863327 is a prime.

It is a super-3 number, since 3×28977990125471³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28977990125395 and 28977990125404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977990125479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308276490650 + ... + 308276490743.

It is an arithmetic number, because the mean of its divisors is an integer number (7398635776728).

Almost surely, 2^{28977990125471} is an apocalyptic number.

28977990125471 is a deficient number, since it is larger than the sum of its proper divisors (616552981441).

28977990125471 is an equidigital number, since it uses as much as digits as its factorization.

28977990125471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616552981440.

The product of its (nonzero) digits is 160030080, while the sum is 71.

The spelling of 28977990125471 in words is "twenty-eight trillion, nine hundred seventy-seven billion, nine hundred ninety million, one hundred twenty-five thousand, four hundred seventy-one".