71757061513 has 8 divisors (see below), whose sum is σ = 73306996488. Its totient is φ = 70214386944.

The previous prime is 71757061511. The next prime is 71757061559. The reversal of 71757061513 is 31516075717.

It can be written as a sum of positive squares in 4 ways, for example, as 27493950969 + 44263110544 = 165813^2 + 210388^2 .

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 71757061513 - 2¹ = 71757061511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71757061513.

It is not an unprimeable number, because it can be changed into a prime (71757061511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795120 + ... + 1834657.

It is an arithmetic number, because the mean of its divisors is an integer number (9163374561).

Almost surely, 2^71757061513 is an apocalyptic number.

It is an amenable number.

71757061513 is a deficient number, since it is larger than the sum of its proper divisors (1549934975).

71757061513 is a wasteful number, since it uses less digits than its factorization.

71757061513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630203.

The product of its (nonzero) digits is 154350, while the sum is 43.

The spelling of 71757061513 in words is "seventy-one billion, seven hundred fifty-seven million, sixty-one thousand, five hundred thirteen".