5555421261 has 16 divisors (see below), whose sum is σ = 8863350720. Its totient is φ = 3418720560.

The previous prime is 5555421241. The next prime is 5555421283. The reversal of 5555421261 is 1621245555.

5555421261 is a `hidden beast` number, since 5 + 55 + 542 + 1 + 2 + 61 = 666.

It is not a de Polignac number, because 5555421261 - 2⁷ = 5555421133 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555421241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7913355 + ... + 7914056.

It is an arithmetic number, because the mean of its divisors is an integer number (553959420).

Almost surely, 2^5555421261 is an apocalyptic number.

It is an amenable number.

5555421261 is a deficient number, since it is larger than the sum of its proper divisors (3307929459).

5555421261 is a wasteful number, since it uses less digits than its factorization.

5555421261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15827433 (or 15827427 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 5555421261 is about 74534.6983692830. The cubic root of 5555421261 is about 1771.0833442633.

The spelling of 5555421261 in words is "five billion, five hundred fifty-five million, four hundred twenty-one thousand, two hundred sixty-one".