1649549556000 has 1536 divisors, whose sum is σ = 6486064865280. Its totient is φ = 406425600000.

The previous prime is 1649549555989. The next prime is 1649549556023. The reversal of 1649549556000 is 6559459461.

1649549556000 is a `hidden beast` number, since 1 + 6 + 4 + 95 + 495 + 5 + 60 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 8373347902 + ... + 8373348098.

It is an arithmetic number, because the mean of its divisors is an integer number (4222698480).

Almost surely, 2^{1649549556000} is an apocalyptic number.

1649549556000 is a gapful number since it is divisible by the number (10) 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 1649549556000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3243032432640).

1649549556000 is an abundant number, since it is smaller than the sum of its proper divisors (4836515309280).

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

1649549556000 is a wasteful number, since it uses less digits than its factorization.

1649549556000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 1649549556000 in words is "one trillion, six hundred forty-nine billion, five hundred forty-nine million, five hundred fifty-six thousand".