1649987418708 has 36 divisors (see below), whose sum is σ = 4171002964128. Its totient is φ = 549969243600.

The previous prime is 1649987418689. The next prime is 1649987418731. The reversal of 1649987418708 is 8078147899461.

1649987418708 is a `hidden beast` number, since 1 + 64 + 9 + 9 + 87 + 418 + 70 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343818 + ... + 1848833.

It is an arithmetic number, because the mean of its divisors is an integer number (115861193448).

Almost surely, 2^{1649987418708} is an apocalyptic number.

1649987418708 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1649987418708 is an abundant number, since it is smaller than the sum of its proper divisors (2521015545420).

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

1649987418708 is a wasteful number, since it uses less digits than its factorization.

1649987418708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213564 (or 2213559 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 72.

The spelling of 1649987418708 in words is "one trillion, six hundred forty-nine billion, nine hundred eighty-seven million, four hundred eighteen thousand, seven hundred eight".