2528729243761 has 4 divisors (see below), whose sum is σ = 2889976278592. Its totient is φ = 2167482208932.

The previous prime is 2528729243743. The next prime is 2528729243783. The reversal of 2528729243761 is 1673429278252.

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 2528729243761 - 2²³ = 2528720855153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2528729243696 and 2528729243705.

It is not an unprimeable number, because it can be changed into a prime (2528729243791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180623517405 + ... + 180623517418.

It is an arithmetic number, because the mean of its divisors is an integer number (722494069648).

Almost surely, 2^{2528729243761} is an apocalyptic number.

It is an amenable number.

2528729243761 is a deficient number, since it is larger than the sum of its proper divisors (361247034831).

2528729243761 is an equidigital number, since it uses as much as digits as its factorization.

2528729243761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361247034830.

The product of its digits is 20321280, while the sum is 58.

The spelling of 2528729243761 in words is "two trillion, five hundred twenty-eight billion, seven hundred twenty-nine million, two hundred forty-three thousand, seven hundred sixty-one".