2520618481 has 2 divisors, whose sum is σ = 2520618482. Its totient is φ = 2520618480.

The previous prime is 2520618431. The next prime is 2520618487. The reversal of 2520618481 is 1848160252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1574502400 + 946116081 = 39680^2 + 30759^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520618481 - 2¹¹ = 2520616433 is a prime.

It is a super-2 number, since 2×2520618481² = 12707035053517494722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2520618481.

It is not a weakly prime, because it can be changed into another prime (2520618487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260309240 + 1260309241.

It is an arithmetic number, because the mean of its divisors is an integer number (1260309241).

Almost surely, 2^2520618481 is an apocalyptic number.

It is an amenable number.

2520618481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520618481 is an equidigital number, since it uses as much as digits as its factorization.

2520618481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 2520618481 is about 50205.7614323297. The cubic root of 2520618481 is about 1360.9297421714.

The spelling of 2520618481 in words is "two billion, five hundred twenty million, six hundred eighteen thousand, four hundred eighty-one".