5145026581 has 2 divisors, whose sum is σ = 5145026582. Its totient is φ = 5145026580.

The previous prime is 5145026563. The next prime is 5145026609. The reversal of 5145026581 is 1856205415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4480160356 + 664866225 = 66934^2 + 25785^2 .

It is a cyclic number.

It is not a de Polignac number, because 5145026581 - 2⁹ = 5145026069 is a prime.

It is a super-2 number, since 2×5145026581² = 52942597038393099122, 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 5145026581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5146026581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2572513290 + 2572513291.

It is an arithmetic number, because the mean of its divisors is an integer number (2572513291).

Almost surely, 2^5145026581 is an apocalyptic number.

It is an amenable number.

5145026581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5145026581 is an equidigital number, since it uses as much as digits as its factorization.

5145026581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 37.

The square root of 5145026581 is about 71728.8406500482. The cubic root of 5145026581 is about 1726.3514250141.

The spelling of 5145026581 in words is "five billion, one hundred forty-five million, twenty-six thousand, five hundred eighty-one".