5126908561 has 4 divisors (see below), whose sum is σ = 5127437824. Its totient is φ = 5126379300.

The previous prime is 5126908537. The next prime is 5126908573. The reversal of 5126908561 is 1658096215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1658096215 = 5 ⋅331619243.

It is a cyclic number.

It is not a de Polignac number, because 5126908561 - 2¹³ = 5126900369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5126905561) 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, 249825 + ... + 269566.

It is an arithmetic number, because the mean of its divisors is an integer number (1281859456).

Almost surely, 2^5126908561 is an apocalyptic number.

It is an amenable number.

5126908561 is a deficient number, since it is larger than the sum of its proper divisors (529263).

5126908561 is an equidigital number, since it uses as much as digits as its factorization.

5126908561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529262.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 5126908561 is about 71602.4340438228. The cubic root of 5126908561 is about 1724.3226142132.

The spelling of 5126908561 in words is "five billion, one hundred twenty-six million, nine hundred eight thousand, five hundred sixty-one".