72442466137 has 2 divisors, whose sum is σ = 72442466138. Its totient is φ = 72442466136.

The previous prime is 72442466029. The next prime is 72442466141. The reversal of 72442466137 is 73166424427.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41783856921 + 30658609216 = 204411^2 + 175096^2 .

It is a cyclic number.

It is not a de Polignac number, because 72442466137 - 2⁷ = 72442466009 is a prime.

It is not a weakly prime, because it can be changed into another prime (72442466147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36221233068 + 36221233069.

It is an arithmetic number, because the mean of its divisors is an integer number (36221233069).

Almost surely, 2^72442466137 is an apocalyptic number.

It is an amenable number.

72442466137 is a deficient number, since it is larger than the sum of its proper divisors (1).

72442466137 is an equidigital number, since it uses as much as digits as its factorization.

72442466137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 46.

The spelling of 72442466137 in words is "seventy-two billion, four hundred forty-two million, four hundred sixty-six thousand, one hundred thirty-seven".