40625619989 has 2 divisors, whose sum is σ = 40625619990. Its totient is φ = 40625619988.

The previous prime is 40625619977. The next prime is 40625620067. The reversal of 40625619989 is 98991652604.

40625619989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40042011025 + 583608964 = 200105^2 + 24158^2 .

It is a cyclic number.

It is not a de Polignac number, because 40625619989 - 2²⁸ = 40357184533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40625619919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20312809994 + 20312809995.

It is an arithmetic number, because the mean of its divisors is an integer number (20312809995).

Almost surely, 2^40625619989 is an apocalyptic number.

It is an amenable number.

40625619989 is a deficient number, since it is larger than the sum of its proper divisors (1).

40625619989 is an equidigital number, since it uses as much as digits as its factorization.

40625619989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 59.

The spelling of 40625619989 in words is "forty billion, six hundred twenty-five million, six hundred nineteen thousand, nine hundred eighty-nine".