2088718561 has 4 divisors (see below), whose sum is σ = 2145170452. Its totient is φ = 2032266672.

The previous prime is 2088718537. The next prime is 2088718603. The reversal of 2088718561 is 1658178802.

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 1506992400 + 581726161 = 38820^2 + 24119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2088718561 - 2²¹ = 2086621409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2088718061) 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, 28225890 + ... + 28225963.

It is an arithmetic number, because the mean of its divisors is an integer number (536292613).

Almost surely, 2^2088718561 is an apocalyptic number.

It is an amenable number.

2088718561 is a deficient number, since it is larger than the sum of its proper divisors (56451891).

2088718561 is an equidigital number, since it uses as much as digits as its factorization.

2088718561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56451890.

The product of its (nonzero) digits is 215040, while the sum is 46.

The square root of 2088718561 is about 45702.5005989825. The cubic root of 2088718561 is about 1278.2819073480.

The spelling of 2088718561 in words is "two billion, eighty-eight million, seven hundred eighteen thousand, five hundred sixty-one".