72022166477893 has 2 divisors, whose sum is σ = 72022166477894. Its totient is φ = 72022166477892.

The previous prime is 72022166477881. The next prime is 72022166477897. The reversal of 72022166477893 is 39877466122027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70031490984324 + 1990675493569 = 8368482^2 + 1410913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72022166477893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72022166477897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36011083238946 + 36011083238947.

It is an arithmetic number, because the mean of its divisors is an integer number (36011083238947).

Almost surely, 2^{72022166477893} is an apocalyptic number.

It is an amenable number.

72022166477893 is a deficient number, since it is larger than the sum of its proper divisors (1).

72022166477893 is an equidigital number, since it uses as much as digits as its factorization.

72022166477893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85349376, while the sum is 64.

The spelling of 72022166477893 in words is "seventy-two trillion, twenty-two billion, one hundred sixty-six million, four hundred seventy-seven thousand, eight hundred ninety-three".