40390266385 has 16 divisors (see below), whose sum is σ = 55505204352. Its totient is φ = 27639763200.

The previous prime is 40390266379. The next prime is 40390266407. The reversal of 40390266385 is 58366209304.

It is a happy number.

It is not a de Polignac number, because 40390266385 - 2¹¹ = 40390264337 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 1157976 + ... + 1192345.

It is an arithmetic number, because the mean of its divisors is an integer number (3469075272).

Almost surely, 2^40390266385 is an apocalyptic number.

It is an amenable number.

40390266385 is a deficient number, since it is larger than the sum of its proper divisors (15114937967).

40390266385 is a wasteful number, since it uses less digits than its factorization.

40390266385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350824.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 40390266385 in words is "forty billion, three hundred ninety million, two hundred sixty-six thousand, three hundred eighty-five".