1649439741600 has 1440 divisors, whose sum is σ = 7271876570112. Its totient is φ = 355829760000.

The previous prime is 1649439741571. The next prime is 1649439741611. The reversal of 1649439741600 is 61479349461.

1649439741600 is a `hidden beast` number, since 1 + 6 + 4 + 94 + 397 + 4 + 160 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a super-2 number, since 2×1649439741600² (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).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 576524170 + ... + 576527030.

Almost surely, 2^{1649439741600} is an apocalyptic number.

1649439741600 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 1649439741600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3635938285056).

1649439741600 is an abundant number, since it is smaller than the sum of its proper divisors (5622436828512).

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

1649439741600 is a wasteful number, since it uses less digits than its factorization.

1649439741600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972 (or 2950 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 1649439741600 in words is "one trillion, six hundred forty-nine billion, four hundred thirty-nine million, seven hundred forty-one thousand, six hundred".