40161619 has 2 divisors, whose sum is σ = 40161620. Its totient is φ = 40161618.

The previous prime is 40161593. The next prime is 40161629. The reversal of 40161619 is 91616104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40161619 - 2¹³ = 40153427 is a prime.

It is a super-2 number, since 2×40161619² = 3225911281402322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40161629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20080809 + 20080810.

It is an arithmetic number, because the mean of its divisors is an integer number (20080810).

Almost surely, 2^40161619 is an apocalyptic number.

40161619 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161619 is an equidigital number, since it uses as much as digits as its factorization.

40161619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 40161619 is about 6337.3195437819. The cubic root of 40161619 is about 342.4551780371.

The spelling of 40161619 in words is "forty million, one hundred sixty-one thousand, six hundred nineteen".