72031693441 has 2 divisors, whose sum is σ = 72031693442. Its totient is φ = 72031693440.

The previous prime is 72031693427. The next prime is 72031693451. The reversal of 72031693441 is 14439613027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55009011600 + 17022681841 = 234540^2 + 130471^2 .

It is a cyclic number.

It is not a de Polignac number, because 72031693441 - 2¹³ = 72031685249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72031693394 and 72031693403.

It is not a weakly prime, because it can be changed into another prime (72031693451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36015846720 + 36015846721.

It is an arithmetic number, because the mean of its divisors is an integer number (36015846721).

Almost surely, 2^72031693441 is an apocalyptic number.

It is an amenable number.

72031693441 is a deficient number, since it is larger than the sum of its proper divisors (1).

72031693441 is an equidigital number, since it uses as much as digits as its factorization.

72031693441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 72031693441 in words is "seventy-two billion, thirty-one million, six hundred ninety-three thousand, four hundred forty-one".