71507637413 has 8 divisors (see below), whose sum is σ = 73461150840. Its totient is φ = 69555222720.

The previous prime is 71507637379. The next prime is 71507637419. The reversal of 71507637413 is 31473670517.

It can be written as a sum of positive squares in 4 ways, for example, as 35271469249 + 36236168164 = 187807^2 + 190358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71507637413 - 2¹² = 71507633317 is a prime.

It is a super-2 number, since 2×71507637413² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71507637419) 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 7 ways as a sum of consecutive naturals, for example, 141878 + ... + 403911.

It is an arithmetic number, because the mean of its divisors is an integer number (9182643855).

Almost surely, 2^71507637413 is an apocalyptic number.

It is an amenable number.

71507637413 is a deficient number, since it is larger than the sum of its proper divisors (1953513427).

71507637413 is a wasteful number, since it uses less digits than its factorization.

71507637413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549367.

The product of its (nonzero) digits is 370440, while the sum is 44.

The spelling of 71507637413 in words is "seventy-one billion, five hundred seven million, six hundred thirty-seven thousand, four hundred thirteen".