1081722238537 has 2 divisors, whose sum is σ = 1081722238538. Its totient is φ = 1081722238536.

The previous prime is 1081722238483. The next prime is 1081722238559. The reversal of 1081722238537 is 7358322271801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541444317241 + 540277921296 = 735829^2 + 735036^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081722238537 - 2⁷ = 1081722238409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1081722238637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540861119268 + 540861119269.

It is an arithmetic number, because the mean of its divisors is an integer number (540861119269).

Almost surely, 2^{1081722238537} is an apocalyptic number.

It is an amenable number.

1081722238537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081722238537 is an equidigital number, since it uses as much as digits as its factorization.

1081722238537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 1081722238537 in words is "one trillion, eighty-one billion, seven hundred twenty-two million, two hundred thirty-eight thousand, five hundred thirty-seven".