71428721452 has 36 divisors (see below), whose sum is σ = 137716171488. Its totient is φ = 32392175200.

The previous prime is 71428721443. The next prime is 71428721453. The reversal of 71428721452 is 25412782417.

It is a junction number, because it is equal to n+sod(n) for n = 71428721399 and 71428721408.

It is not an unprimeable number, because it can be changed into a prime (71428721453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37398 + ... + 379810.

It is an arithmetic number, because the mean of its divisors is an integer number (3825449208).

Almost surely, 2^71428721452 is an apocalyptic number.

It is an amenable number.

71428721452 is a deficient number, since it is larger than the sum of its proper divisors (66287450036).

71428721452 is a wasteful number, since it uses less digits than its factorization.

71428721452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342870 (or 342857 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The spelling of 71428721452 in words is "seventy-one billion, four hundred twenty-eight million, seven hundred twenty-one thousand, four hundred fifty-two".