6557061531 has 16 divisors (see below), whose sum is σ = 8848418688. Its totient is φ = 4318843200.

The previous prime is 6557061527. The next prime is 6557061569. The reversal of 6557061531 is 1351607556.

It is not a de Polignac number, because 6557061531 - 2² = 6557061527 is a prime.

It is a super-2 number, since 2×6557061531² = 85990111842640127922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6557061531.

It is not an unprimeable number, because it can be changed into a prime (6557061631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48916 + ... + 124526.

It is an arithmetic number, because the mean of its divisors is an integer number (553026168).

Almost surely, 2^6557061531 is an apocalyptic number.

6557061531 is a deficient number, since it is larger than the sum of its proper divisors (2291357157).

6557061531 is a wasteful number, since it uses less digits than its factorization.

6557061531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75962.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 6557061531 is about 80975.6848134056. The cubic root of 6557061531 is about 1871.7007729164.

The spelling of 6557061531 in words is "six billion, five hundred fifty-seven million, sixty-one thousand, five hundred thirty-one".