1810949616 has 160 divisors (see below), whose sum is σ = 6290311680. Its totient is φ = 486964224.

The previous prime is 1810949593. The next prime is 1810949659. The reversal of 1810949616 is 6169490181.

1810949616 is a `hidden beast` number, since 18 + 10 + 9 + 4 + 9 + 616 = 666.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33795 + ... + 69021.

It is an arithmetic number, because the mean of its divisors is an integer number (39314448).

Almost surely, 2^1810949616 is an apocalyptic number.

1810949616 is a gapful number since it is divisible by the number (16) 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 1810949616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3145155840).

1810949616 is an abundant number, since it is smaller than the sum of its proper divisors (4479362064).

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

1810949616 is a wasteful number, since it uses less digits than its factorization.

1810949616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35268 (or 35256 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1810949616 is about 42555.2536827123. The cubic root of 1810949616 is about 1218.9019987465.

The spelling of 1810949616 in words is "one billion, eight hundred ten million, nine hundred forty-nine thousand, six hundred sixteen".