1649692839552 has 128 divisors (see below), whose sum is σ = 4437251703360. Its totient is φ = 542971011072.

The previous prime is 1649692839517. The next prime is 1649692839569. The reversal of 1649692839552 is 2559382969461.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61595188 + ... + 61621964.

Almost surely, 2^{1649692839552} is an apocalyptic number.

1649692839552 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 1649692839552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2218625851680).

1649692839552 is an abundant number, since it is smaller than the sum of its proper divisors (2787558863808).

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

1649692839552 is a wasteful number, since it uses less digits than its factorization.

1649692839552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28810 (or 28798 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 69.

The spelling of 1649692839552 in words is "one trillion, six hundred forty-nine billion, six hundred ninety-two million, eight hundred thirty-nine thousand, five hundred fifty-two".