40334509921 has 2 divisors, whose sum is σ = 40334509922. Its totient is φ = 40334509920.

The previous prime is 40334509907. The next prime is 40334509931. The reversal of 40334509921 is 12990543304.

40334509921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40040010000 + 294499921 = 200100^2 + 17161^2 .

It is a cyclic number.

It is not a de Polignac number, because 40334509921 - 2⁹ = 40334509409 is a prime.

It is not a weakly prime, because it can be changed into another prime (40334509931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20167254960 + 20167254961.

It is an arithmetic number, because the mean of its divisors is an integer number (20167254961).

Almost surely, 2^40334509921 is an apocalyptic number.

It is an amenable number.

40334509921 is a deficient number, since it is larger than the sum of its proper divisors (1).

40334509921 is an equidigital number, since it uses as much as digits as its factorization.

40334509921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 40334509921 in words is "forty billion, three hundred thirty-four million, five hundred nine thousand, nine hundred twenty-one".