6531551356 has 12 divisors (see below), whose sum is σ = 12469325400. Its totient is φ = 2968886960.

The previous prime is 6531551333. The next prime is 6531551381.

It is a happy number.

6531551356 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×6531551356³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74222131 + ... + 74222218.

It is an arithmetic number, because the mean of its divisors is an integer number (1039110450).

Almost surely, 2^6531551356 is an apocalyptic number.

It is an amenable number.

6531551356 is a deficient number, since it is larger than the sum of its proper divisors (5937774044).

6531551356 is a wasteful number, since it uses less digits than its factorization.

6531551356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148444364 (or 148444362 counting only the distinct ones).

The product of its digits is 202500, while the sum is 40.

The square root of 6531551356 is about 80818.0138088038. The cubic root of 6531551356 is about 1869.2703413132.

The spelling of 6531551356 in words is "six billion, five hundred thirty-one million, five hundred fifty-one thousand, three hundred fifty-six".