71890211540 has 48 divisors (see below), whose sum is σ = 172855611264. Its totient is φ = 24602486400.

The previous prime is 71890211537. The next prime is 71890211563. The reversal of 71890211540 is 4511209817.

It is a junction number, because it is equal to n+sod(n) for n = 71890211494 and 71890211503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398846 + ... + 550325.

It is an arithmetic number, because the mean of its divisors is an integer number (3601158568).

Almost surely, 2^71890211540 is an apocalyptic number.

71890211540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71890211540 is an abundant number, since it is smaller than the sum of its proper divisors (100965399724).

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

71890211540 is a wasteful number, since it uses less digits than its factorization.

71890211540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949728 (or 949726 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 71890211540 in words is "seventy-one billion, eight hundred ninety million, two hundred eleven thousand, five hundred forty".