5555500061 has 4 divisors (see below), whose sum is σ = 5617921500. Its totient is φ = 5493078624.

The previous prime is 5555500039. The next prime is 5555500099. The reversal of 5555500061 is 1600055555.

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 3446394436 + 2109105625 = 58706^2 + 45925^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555500061 - 2²² = 5551305757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555500001) 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, 31210586 + ... + 31210763.

It is an arithmetic number, because the mean of its divisors is an integer number (1404480375).

Almost surely, 2^5555500061 is an apocalyptic number.

It is an amenable number.

5555500061 is a deficient number, since it is larger than the sum of its proper divisors (62421439).

5555500061 is an equidigital number, since it uses as much as digits as its factorization.

5555500061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62421438.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 5555500061 is about 74535.2269802675. The cubic root of 5555500061 is about 1771.0917181082.

The spelling of 5555500061 in words is "five billion, five hundred fifty-five million, five hundred thousand, sixty-one".