71388472541 has 4 divisors (see below), whose sum is σ = 72190590300. Its totient is φ = 70586354784.

The previous prime is 71388472489. The next prime is 71388472567. The reversal of 71388472541 is 14527488317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14527488317 = 29 ⋅500947873.

It can be written as a sum of positive squares in 2 ways, for example, as 28907140441 + 42481332100 = 170021^2 + 206110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71388472541 is a prime.

It is a super-2 number, since 2×71388472541² (a number of 23 digits) contains 22 as substring.

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 71388472541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71388475541) 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 3 ways as a sum of consecutive naturals, for example, 401058746 + ... + 401058923.

It is an arithmetic number, because the mean of its divisors is an integer number (18047647575).

Almost surely, 2^71388472541 is an apocalyptic number.

It is an amenable number.

71388472541 is a deficient number, since it is larger than the sum of its proper divisors (802117759).

71388472541 is an equidigital number, since it uses as much as digits as its factorization.

71388472541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802117758.

The product of its digits is 1505280, while the sum is 50.

The spelling of 71388472541 in words is "seventy-one billion, three hundred eighty-eight million, four hundred seventy-two thousand, five hundred forty-one".