71642946245 has 32 divisors (see below), whose sum is σ = 92985647328. Its totient is φ = 52676886528.

The previous prime is 71642946227. The next prime is 71642946257. The reversal of 71642946245 is 54264924617.

It is a Cunningham number, because it is equal to 267662²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 45851228641 + 25791717604 = 214129^2 + 160598^2 .

It is a cyclic number.

It is not a de Polignac number, because 71642946245 - 2²⁴ = 71626169029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71642946193 and 71642946202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25074857 + ... + 25077713.

It is an arithmetic number, because the mean of its divisors is an integer number (2905801479).

Almost surely, 2^71642946245 is an apocalyptic number.

It is an amenable number.

71642946245 is a deficient number, since it is larger than the sum of its proper divisors (21342701083).

71642946245 is a wasteful number, since it uses less digits than its factorization.

71642946245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409.

The product of its digits is 2903040, while the sum is 50.

The spelling of 71642946245 in words is "seventy-one billion, six hundred forty-two million, nine hundred forty-six thousand, two hundred forty-five".