1906386897636 has 108 divisors (see below), whose sum is σ = 5218998309252. Its totient is φ = 586482204672.

The previous prime is 1906386897617. The next prime is 1906386897683. The reversal of 1906386897636 is 6367986836091.

It can be written as a sum of positive squares in 6 ways, for example, as 1007000208036 + 899386689600 = 1003494^2 + 948360^2 .

It is a super-2 number, since 2×1906386897636² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 41695140 + ... + 41740836.

It is an arithmetic number, because the mean of its divisors is an integer number (48324058419).

Almost surely, 2^{1906386897636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906386897636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2609499154626).

1906386897636 is an abundant number, since it is smaller than the sum of its proper divisors (3312611411616).

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

1906386897636 is a wasteful number, since it uses less digits than its factorization.

1906386897636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52590 (or 52572 counting only the distinct ones).

The product of its (nonzero) digits is 423263232, while the sum is 72.

The spelling of 1906386897636 in words is "one trillion, nine hundred six billion, three hundred eighty-six million, eight hundred ninety-seven thousand, six hundred thirty-six".