40386664458 has 72 divisors (see below), whose sum is σ = 105300975780. Its totient is φ = 11141141760.

The previous prime is 40386664447. The next prime is 40386664469. The reversal of 40386664458 is 85446668304.

It is an interprime number because it is at equal distance from previous prime (40386664447) and next prime (40386664469).

It can be written as a sum of positive squares in 2 ways, for example, as 37188422649 + 3198241809 = 192843^2 + 56553^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 763903 + ... + 815058.

Almost surely, 2^40386664458 is an apocalyptic number.

40386664458 is an abundant number, since it is smaller than the sum of its proper divisors (64914311322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40386664458 is a wasteful number, since it uses less digits than its factorization.

40386664458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579012 (or 1579002 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 54.

The spelling of 40386664458 in words is "forty billion, three hundred eighty-six million, six hundred sixty-four thousand, four hundred fifty-eight".