2528026261 has 4 divisors (see below), whose sum is σ = 2528472652. Its totient is φ = 2527579872.

The previous prime is 2528026219. The next prime is 2528026279. The reversal of 2528026261 is 1626208252.

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 575712036 + 1952314225 = 23994^2 + 44185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2528026261 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 (2528126261) 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, 214590 + ... + 226063.

It is an arithmetic number, because the mean of its divisors is an integer number (632118163).

Almost surely, 2^2528026261 is an apocalyptic number.

It is an amenable number.

2528026261 is a deficient number, since it is larger than the sum of its proper divisors (446391).

2528026261 is an equidigital number, since it uses as much as digits as its factorization.

2528026261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446390.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 2528026261 is about 50279.4815108509. The cubic root of 2528026261 is about 1362.2616385875.

The spelling of 2528026261 in words is "two billion, five hundred twenty-eight million, twenty-six thousand, two hundred sixty-one".