1649823051880 has 32 divisors (see below), whose sum is σ = 3712164164640. Its totient is φ = 659918145600.

The previous prime is 1649823051841. The next prime is 1649823051883. The reversal of 1649823051880 is 881503289461.

It is a happy number.

It is a super-2 number, since 2×1649823051880² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1649823051883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320867 + ... + 2947213.

It is an arithmetic number, because the mean of its divisors is an integer number (116005130145).

Almost surely, 2^{1649823051880} is an apocalyptic number.

1649823051880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649823051880 is an abundant number, since it is smaller than the sum of its proper divisors (2062341112760).

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

1649823051880 is a wasteful number, since it uses less digits than its factorization.

1649823051880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692209 (or 692205 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 1649823051880 in words is "one trillion, six hundred forty-nine billion, eight hundred twenty-three million, fifty-one thousand, eight hundred eighty".