6531472739 has 16 divisors (see below), whose sum is σ = 7373230080. Its totient is φ = 5731992000.

The previous prime is 6531472723. The next prime is 6531472781. The reversal of 6531472739 is 9372741356.

It is a cyclic number.

It is not a de Polignac number, because 6531472739 - 2⁴ = 6531472723 is a prime.

It is a super-2 number, since 2×6531472739² = 85320272280600324242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6531472693 and 6531472702.

It is not an unprimeable number, because it can be changed into a prime (6531472789) 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, 116054 + ... + 162884.

It is an arithmetic number, because the mean of its divisors is an integer number (460826880).

Almost surely, 2^6531472739 is an apocalyptic number.

6531472739 is a deficient number, since it is larger than the sum of its proper divisors (841757341).

6531472739 is a wasteful number, since it uses less digits than its factorization.

6531472739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47282.

The product of its digits is 952560, while the sum is 47.

The square root of 6531472739 is about 80817.5274244393. The cubic root of 6531472739 is about 1869.2628414607.

The spelling of 6531472739 in words is "six billion, five hundred thirty-one million, four hundred seventy-two thousand, seven hundred thirty-nine".