71379274561 has 9 divisors (see below), whose sum is σ = 83035209249. Its totient is φ = 61180632324.

The previous prime is 71379274541. The next prime is 71379274609. The reversal of 71379274561 is 16547297317.

It is a happy number.

The square root of 71379274561 is 267169.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 71379274561 - 2¹³ = 71379266369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71379274499 and 71379274508.

It is not an unprimeable number, because it can be changed into a prime (71379274511) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1851100 + ... + 1889266.

It is an arithmetic number, because the mean of its divisors is an integer number (9226134361).

Almost surely, 2^71379274561 is an apocalyptic number.

71379274561 is the 267169-th square number.

71379274561 is the 133585-th centered octagonal number.

It is an amenable number.

71379274561 is a deficient number, since it is larger than the sum of its proper divisors (11655934688).

71379274561 is an frugal number, since it uses more digits than its factorization.

71379274561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76348 (or 38174 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 52.

The spelling of 71379274561 in words is "seventy-one billion, three hundred seventy-nine million, two hundred seventy-four thousand, five hundred sixty-one".