1064905903638 has 16 divisors (see below), whose sum is σ = 2366457563760. Its totient is φ = 354968634528.

The previous prime is 1064905903637. The next prime is 1064905903681. The reversal of 1064905903638 is 8363095094601.

1064905903638 is a `hidden beast` number, since 1 + 0 + 6 + 49 + 0 + 590 + 3 + 6 + 3 + 8 = 666.

It is a super-2 number, since 2×1064905903638² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 19720479697 = 1064905903638 / (1 + 0 + 6 + 4 + 9 + 0 + 5 + 9 + 0 + 3 + 6 + 3 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1064905903637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9860239795 + ... + 9860239902.

It is an arithmetic number, because the mean of its divisors is an integer number (147903597735).

Almost surely, 2^{1064905903638} is an apocalyptic number.

1064905903638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1064905903638 is an abundant number, since it is smaller than the sum of its proper divisors (1301551660122).

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

1064905903638 is a wasteful number, since it uses less digits than its factorization.

1064905903638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19720479708 (or 19720479702 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 1064905903638 in words is "one trillion, sixty-four billion, nine hundred five million, nine hundred three thousand, six hundred thirty-eight".