2528718428661 has 16 divisors (see below), whose sum is σ = 3518395992960. Its totient is φ = 1612434035520.

The previous prime is 2528718428659. The next prime is 2528718428693. The reversal of 2528718428661 is 1668248178252.

It is a happy number.

It is not a de Polignac number, because 2528718428661 - 2¹ = 2528718428659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2528718428595 and 2528718428604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528718428641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447795 + ... + 2293023.

It is an arithmetic number, because the mean of its divisors is an integer number (219899749560).

Almost surely, 2^{2528718428661} is an apocalyptic number.

It is an amenable number.

2528718428661 is a deficient number, since it is larger than the sum of its proper divisors (989677564299).

2528718428661 is a wasteful number, since it uses less digits than its factorization.

2528718428661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865116.

The product of its digits is 20643840, while the sum is 60.

The spelling of 2528718428661 in words is "two trillion, five hundred twenty-eight billion, seven hundred eighteen million, four hundred twenty-eight thousand, six hundred sixty-one".