6557242551 has 16 divisors (see below), whose sum is σ = 9211655040. Its totient is φ = 4137588000.

The previous prime is 6557242501. The next prime is 6557242561. The reversal of 6557242551 is 1552427556.

It is not a de Polignac number, because 6557242551 - 2⁷ = 6557242423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557242501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9676 + ... + 114926.

It is an arithmetic number, because the mean of its divisors is an integer number (575728440).

Almost surely, 2^6557242551 is an apocalyptic number.

6557242551 is a deficient number, since it is larger than the sum of its proper divisors (2654412489).

6557242551 is a wasteful number, since it uses less digits than its factorization.

6557242551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106366.

The product of its digits is 420000, while the sum is 42.

The square root of 6557242551 is about 80976.8025486312. The cubic root of 6557242551 is about 1871.7179966964.

The spelling of 6557242551 in words is "six billion, five hundred fifty-seven million, two hundred forty-two thousand, five hundred fifty-one".