72167076109 has 2 divisors, whose sum is σ = 72167076110. Its totient is φ = 72167076108.

The previous prime is 72167076089. The next prime is 72167076131. The reversal of 72167076109 is 90167076127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38997560484 + 33169515625 = 197478^2 + 182125^2 .

It is a cyclic number.

It is not a de Polignac number, because 72167076109 - 2²³ = 72158687501 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72167076199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36083538054 + 36083538055.

It is an arithmetic number, because the mean of its divisors is an integer number (36083538055).

Almost surely, 2^72167076109 is an apocalyptic number.

It is an amenable number.

72167076109 is a deficient number, since it is larger than the sum of its proper divisors (1).

72167076109 is an equidigital number, since it uses as much as digits as its factorization.

72167076109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 46.

The spelling of 72167076109 in words is "seventy-two billion, one hundred sixty-seven million, seventy-six thousand, one hundred nine".