72443470537 has 2 divisors, whose sum is σ = 72443470538. Its totient is φ = 72443470536.

The previous prime is 72443470513. The next prime is 72443470549. The reversal of 72443470537 is 73507434427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63812317321 + 8631153216 = 252611^2 + 92904^2 .

It is a cyclic number.

It is not a de Polignac number, because 72443470537 - 2¹⁵ = 72443437769 is a prime.

It is not a weakly prime, because it can be changed into another prime (72443470577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36221735268 + 36221735269.

It is an arithmetic number, because the mean of its divisors is an integer number (36221735269).

Almost surely, 2^72443470537 is an apocalyptic number.

It is an amenable number.

72443470537 is a deficient number, since it is larger than the sum of its proper divisors (1).

72443470537 is an equidigital number, since it uses as much as digits as its factorization.

72443470537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 46.

The spelling of 72443470537 in words is "seventy-two billion, four hundred forty-three million, four hundred seventy thousand, five hundred thirty-seven".