1649142960 has 80 divisors (see below), whose sum is σ = 5277281280. Its totient is φ = 425583360.

The previous prime is 1649142893. The next prime is 1649142961. The reversal of 1649142960 is 692419461.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1649142961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103390 + ... + 118269.

It is an arithmetic number, because the mean of its divisors is an integer number (65966016).

Almost surely, 2^1649142960 is an apocalyptic number.

1649142960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649142960 is an abundant number, since it is smaller than the sum of its proper divisors (3628138320).

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

1649142960 is a wasteful number, since it uses less digits than its factorization.

1649142960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221706 (or 221700 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1649142960 is about 40609.6412197892. The cubic root of 1649142960 is about 1181.4611221423.

The spelling of 1649142960 in words is "one billion, six hundred forty-nine million, one hundred forty-two thousand, nine hundred sixty".