1649254743520 has 96 divisors (see below), whose sum is σ = 4027950581760. Its totient is φ = 637485150720.

The previous prime is 1649254743457. The next prime is 1649254743523. The reversal of 1649254743520 is 253474529461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649254743523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3144261 + ... + 3631099.

It is an arithmetic number, because the mean of its divisors is an integer number (41957818560).

Almost surely, 2^{1649254743520} is an apocalyptic number.

1649254743520 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 1649254743520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013975290880).

1649254743520 is an abundant number, since it is smaller than the sum of its proper divisors (2378695838240).

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

1649254743520 is a wasteful number, since it uses less digits than its factorization.

1649254743520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487568 (or 487560 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 52.

The spelling of 1649254743520 in words is "one trillion, six hundred forty-nine billion, two hundred fifty-four million, seven hundred forty-three thousand, five hundred twenty".