1810880064 has 210 divisors, whose sum is σ = 6245302470. Its totient is φ = 517321728.

The previous prime is 1810880059. The next prime is 1810880081. The reversal of 1810880064 is 4600880181.

It can be written as a sum of positive squares in only one way, i.e., 1625702400 + 185177664 = 40320^2 + 13608^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 250452 + ... + 257580.

Almost surely, 2^1810880064 is an apocalyptic number.

1810880064 is a gapful number since it is divisible by the number (14) 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 1810880064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3122651235).

1810880064 is an abundant number, since it is smaller than the sum of its proper divisors (4434422406).

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

1810880064 is an equidigital number, since it uses as much as digits as its factorization.

1810880064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167 (or 7141 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1810880064 is about 42554.4364784684. The cubic root of 1810880064 is about 1218.8863940133.

The spelling of 1810880064 in words is "one billion, eight hundred ten million, eight hundred eighty thousand, sixty-four".