1649940804792 has 256 divisors, whose sum is σ = 5300335872000. Its totient is φ = 465800315904.

The previous prime is 1649940804779. The next prime is 1649940804817. The reversal of 1649940804792 is 2974080499461.

1649940804792 is a `hidden beast` number, since 1 + 6 + 49 + 9 + 40 + 80 + 479 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 260116773 + ... + 260123115.

It is an arithmetic number, because the mean of its divisors is an integer number (20704437000).

Almost surely, 2^{1649940804792} is an apocalyptic number.

1649940804792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649940804792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2650167936000).

1649940804792 is an abundant number, since it is smaller than the sum of its proper divisors (3650395067208).

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

1649940804792 is a wasteful number, since it uses less digits than its factorization.

1649940804792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387 (or 8377 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 1649940804792 in words is "one trillion, six hundred forty-nine billion, nine hundred forty million, eight hundred four thousand, seven hundred ninety-two".