71157520004 has 12 divisors (see below), whose sum is σ = 126231491484. Its totient is φ = 35091379584.

The previous prime is 71157520003. The next prime is 71157520019. The reversal of 71157520004 is 40002575117.

It can be written as a sum of positive squares in 2 ways, for example, as 47471694400 + 23685825604 = 217880^2 + 153902^2 .

It is not an unprimeable number, because it can be changed into a prime (71157520003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121844777 + ... + 121845360.

It is an arithmetic number, because the mean of its divisors is an integer number (10519290957).

Almost surely, 2^71157520004 is an apocalyptic number.

It is an amenable number.

71157520004 is a deficient number, since it is larger than the sum of its proper divisors (55073971480).

71157520004 is a wasteful number, since it uses less digits than its factorization.

71157520004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243690214 (or 243690212 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The spelling of 71157520004 in words is "seventy-one billion, one hundred fifty-seven million, five hundred twenty thousand, four".