40551121189 has 2 divisors, whose sum is σ = 40551121190. Its totient is φ = 40551121188.

The previous prime is 40551121181. The next prime is 40551121231. The reversal of 40551121189 is 98112115504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39936824964 + 614296225 = 199842^2 + 24785^2 .

It is a cyclic number.

It is not a de Polignac number, because 40551121189 - 2³ = 40551121181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40551121181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20275560594 + 20275560595.

It is an arithmetic number, because the mean of its divisors is an integer number (20275560595).

Almost surely, 2^40551121189 is an apocalyptic number.

It is an amenable number.

40551121189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40551121189 is an equidigital number, since it uses as much as digits as its factorization.

40551121189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The spelling of 40551121189 in words is "forty billion, five hundred fifty-one million, one hundred twenty-one thousand, one hundred eighty-nine".