5501061561 has 16 divisors (see below), whose sum is σ = 7495697664. Its totient is φ = 3587001984.

The previous prime is 5501061551. The next prime is 5501061563. The reversal of 5501061561 is 1651601055.

It is not a de Polignac number, because 5501061561 - 2⁶ = 5501061497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5501061563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218901 + ... + 242733.

It is an arithmetic number, because the mean of its divisors is an integer number (468481104).

Almost surely, 2^5501061561 is an apocalyptic number.

It is an amenable number.

5501061561 is a deficient number, since it is larger than the sum of its proper divisors (1994636103).

5501061561 is a wasteful number, since it uses less digits than its factorization.

5501061561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25520.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 5501061561 is about 74169.1415684448. The cubic root of 5501061561 is about 1765.2877264212.

The spelling of 5501061561 in words is "five billion, five hundred one million, sixty-one thousand, five hundred sixty-one".