1640005432365 has 64 divisors (see below), whose sum is σ = 2732202869760. Its totient is φ = 839283793920.

The previous prime is 1640005432363. The next prime is 1640005432367. The reversal of 1640005432365 is 5632345000461.

It is an interprime number because it is at equal distance from previous prime (1640005432363) and next prime (1640005432367).

It is not a de Polignac number, because 1640005432365 - 2¹ = 1640005432363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640005432363) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38606217 + ... + 38648673.

It is an arithmetic number, because the mean of its divisors is an integer number (42690669840).

Almost surely, 2^{1640005432365} is an apocalyptic number.

1640005432365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1640005432365 is a deficient number, since it is larger than the sum of its proper divisors (1092197437395).

1640005432365 is a wasteful number, since it uses less digits than its factorization.

1640005432365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43462.

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 1640005432365 in words is "one trillion, six hundred forty billion, five million, four hundred thirty-two thousand, three hundred sixty-five".