71872195854 has 32 divisors (see below), whose sum is σ = 145206927360. Its totient is φ = 23714504352.

The previous prime is 71872195711. The next prime is 71872195883. The reversal of 71872195854 is 45859127817.

It is a happy number.

It is a super-2 number, since 2×71872195854² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71872195794 and 71872195803.

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, 227092 + ... + 441944.

It is an arithmetic number, because the mean of its divisors is an integer number (4537716480).

Almost surely, 2^71872195854 is an apocalyptic number.

71872195854 is an abundant number, since it is smaller than the sum of its proper divisors (73334731506).

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

71872195854 is a wasteful number, since it uses less digits than its factorization.

71872195854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215424.

The product of its digits is 5644800, while the sum is 57.

The spelling of 71872195854 in words is "seventy-one billion, eight hundred seventy-two million, one hundred ninety-five thousand, eight hundred fifty-four".