1645736336 has 10 divisors (see below), whose sum is σ = 3188614182. Its totient is φ = 822868160.

The previous prime is 1645736321. The next prime is 1645736359. The reversal of 1645736336 is 6336375461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1341024400 + 304711936 = 36620^2 + 17456^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51429245 + ... + 51429276.

Almost surely, 2^1645736336 is an apocalyptic number.

1645736336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1645736336 is a deficient number, since it is larger than the sum of its proper divisors (1542877846).

1645736336 is a wasteful number, since it uses less digits than its factorization.

1645736336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102858529 (or 102858523 counting only the distinct ones).

The product of its digits is 816480, while the sum is 44.

The square root of 1645736336 is about 40567.6759994950. The cubic root of 1645736336 is about 1180.6470491306.

The spelling of 1645736336 in words is "one billion, six hundred forty-five million, seven hundred thirty-six thousand, three hundred thirty-six".