40444462921 has 2 divisors, whose sum is σ = 40444462922. Its totient is φ = 40444462920.

The previous prime is 40444462859. The next prime is 40444462939. The reversal of 40444462921 is 12926444404.

40444462921 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., 37098997321 + 3345465600 = 192611^2 + 57840^2 .

It is a cyclic number.

It is not a de Polignac number, because 40444462921 - 2¹⁷ = 40444331849 is a prime.

It is not a weakly prime, because it can be changed into another prime (40444466921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222231460 + 20222231461.

It is an arithmetic number, because the mean of its divisors is an integer number (20222231461).

Almost surely, 2^40444462921 is an apocalyptic number.

It is an amenable number.

40444462921 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444462921 is an equidigital number, since it uses as much as digits as its factorization.

40444462921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 40444462921 in words is "forty billion, four hundred forty-four million, four hundred sixty-two thousand, nine hundred twenty-one".