71857045774320 has 40 divisors (see below), whose sum is σ = 222756841901136. Its totient is φ = 19161878873088.

The previous prime is 71857045774313. The next prime is 71857045774331. The reversal of 71857045774320 is 2347754075817.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 149702178457 + ... + 149702178936.

Almost surely, 2^{71857045774320} is an apocalyptic number.

It is an amenable number.

71857045774320 is an abundant number, since it is smaller than the sum of its proper divisors (150899796126816).

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

71857045774320 is a wasteful number, since it uses less digits than its factorization.

71857045774320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299404357409 (or 299404357403 counting only the distinct ones).

The product of its (nonzero) digits is 46099200, while the sum is 60.

The spelling of 71857045774320 in words is "seventy-one trillion, eight hundred fifty-seven billion, forty-five million, seven hundred seventy-four thousand, three hundred twenty".