40908419221 has 2 divisors, whose sum is σ = 40908419222. Its totient is φ = 40908419220.

The previous prime is 40908419213. The next prime is 40908419231. The reversal of 40908419221 is 12291480904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37902638596 + 3005780625 = 194686^2 + 54825^2 .

It is a cyclic number.

It is not a de Polignac number, because 40908419221 - 2³ = 40908419213 is a prime.

It is a super-2 number, since 2×40908419221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40908419231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20454209610 + 20454209611.

It is an arithmetic number, because the mean of its divisors is an integer number (20454209611).

Almost surely, 2^40908419221 is an apocalyptic number.

It is an amenable number.

40908419221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40908419221 is an equidigital number, since it uses as much as digits as its factorization.

40908419221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 40908419221 in words is "forty billion, nine hundred eight million, four hundred nineteen thousand, two hundred twenty-one".