71361968420 has 24 divisors (see below), whose sum is σ = 149868209400. Its totient is φ = 28543249152.

The previous prime is 71361968407. The next prime is 71361968449. The reversal of 71361968420 is 2486916317.

It can be written as a sum of positive squares in 4 ways, for example, as 17131668544 + 54230299876 = 130888^2 + 232874^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330446 + ... + 501914.

It is an arithmetic number, because the mean of its divisors is an integer number (6244508725).

Almost surely, 2^71361968420 is an apocalyptic number.

It is an amenable number.

71361968420 is an abundant number, since it is smaller than the sum of its proper divisors (78506240980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71361968420 is a wasteful number, since it uses less digits than its factorization.

71361968420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192287 (or 192285 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 71361968420 in words is "seventy-one billion, three hundred sixty-one million, nine hundred sixty-eight thousand, four hundred twenty".