40481185081 has 2 divisors, whose sum is σ = 40481185082. Its totient is φ = 40481185080.

The previous prime is 40481185061. The next prime is 40481185093. The reversal of 40481185081 is 18058118404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35989504681 + 4491680400 = 189709^2 + 67020^2 .

It is a cyclic number.

It is not a de Polignac number, because 40481185081 - 2²³ = 40472796473 is a prime.

It is a super-2 number, since 2×40481185081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40481185061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20240592540 + 20240592541.

It is an arithmetic number, because the mean of its divisors is an integer number (20240592541).

Almost surely, 2^40481185081 is an apocalyptic number.

It is an amenable number.

40481185081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40481185081 is an equidigital number, since it uses as much as digits as its factorization.

40481185081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40960, while the sum is 40.

The spelling of 40481185081 in words is "forty billion, four hundred eighty-one million, one hundred eighty-five thousand, eighty-one".