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71442871573 = 101970110767
BaseRepresentation
bin100001010001001010…
…0111011010100010101
320211101222100220120111
41002202110323110111
52132303333342243
652453112403021
75106264250213
oct1024224732425
9224358326514
1071442871573
1128331702917
1211a1a0a6471
136977356a08
14365a4c7cb3
151cd212339d
hex10a253b515

71442871573 has 4 divisors (see below), whose sum is σ = 71512983360. Its totient is φ = 71372759788.

The previous prime is 71442871537. The next prime is 71442871597. The reversal of 71442871573 is 37517824417.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37517824417 = 63895872253.

It is a cyclic number.

It is not a de Polignac number, because 71442871573 - 229 = 70906000661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71442871523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35054365 + ... + 35056402.

It is an arithmetic number, because the mean of its divisors is an integer number (17878245840).

Almost surely, 271442871573 is an apocalyptic number.

It is an amenable number.

71442871573 is a deficient number, since it is larger than the sum of its proper divisors (70111787).

71442871573 is a wasteful number, since it uses less digits than its factorization.

71442871573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70111786.

The product of its digits is 1317120, while the sum is 49.

The spelling of 71442871573 in words is "seventy-one billion, four hundred forty-two million, eight hundred seventy-one thousand, five hundred seventy-three".

Divisors: 1 1019 70110767 71442871573