71387730485321 has 32 divisors (see below), whose sum is σ = 75615993815040. Its totient is φ = 67255125537600.

The previous prime is 71387730485303. The next prime is 71387730485329. The reversal of 71387730485321 is 12358403778317.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71387730485321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71387730485329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10669213586 + ... + 10669220276.

It is an arithmetic number, because the mean of its divisors is an integer number (2362999806720).

Almost surely, 2^{71387730485321} is an apocalyptic number.

71387730485321 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

71387730485321 is a deficient number, since it is larger than the sum of its proper divisors (4228263329719).

71387730485321 is a wasteful number, since it uses less digits than its factorization.

71387730485321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12317.

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 71387730485321 in words is "seventy-one trillion, three hundred eighty-seven billion, seven hundred thirty million, four hundred eighty-five thousand, three hundred twenty-one".