5508691501 has 4 divisors (see below), whose sum is σ = 5508843004. Its totient is φ = 5508540000.

The previous prime is 5508691477. The next prime is 5508691511. The reversal of 5508691501 is 1051968055.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1051968055 = 5 ⋅210393611.

It can be written as a sum of positive squares in 2 ways, for example, as 3240455625 + 2268235876 = 56925^2 + 47626^2 .

It is a 3-Lehmer number, since φ(5508691501) divides (5508691501-1)³.

It is a cyclic number.

It is not a de Polignac number, because 5508691501 - 2⁹ = 5508690989 is a prime.

It is a deceptive number, since it divides R_5508691500.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5508691511) 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, 15151 + ... + 106051.

It is an arithmetic number, because the mean of its divisors is an integer number (1377210751).

Almost surely, 2^5508691501 is an apocalyptic number.

5508691501 is the 60601-st pentagonal number.

It is an amenable number.

5508691501 is a deficient number, since it is larger than the sum of its proper divisors (151503).

5508691501 is an equidigital number, since it uses as much as digits as its factorization.

5508691501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151502.

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 5508691501 is about 74220.5598267758. The cubic root of 5508691501 is about 1766.1034972757.

The spelling of 5508691501 in words is "five billion, five hundred eight million, six hundred ninety-one thousand, five hundred one".