1819512064 has 18 divisors (see below), whose sum is σ = 3631917170. Its totient is φ = 909755904.

The previous prime is 1819512061. The next prime is 1819512073. The reversal of 1819512064 is 4602159181.

It can be written as a sum of positive squares in only one way, i.e., 985457664 + 834054400 = 31392^2 + 28880^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819512061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3553479 + ... + 3553990.

Almost surely, 2^1819512064 is an apocalyptic number.

It is an amenable number.

1819512064 is a deficient number, since it is larger than the sum of its proper divisors (1812405106).

1819512064 is an frugal number, since it uses more digits than its factorization.

1819512064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107485 (or 7107471 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 1819512064 is about 42655.7389339348. The cubic root of 1819512064 is about 1220.8200309681.

The spelling of 1819512064 in words is "one billion, eight hundred nineteen million, five hundred twelve thousand, sixty-four".