1645996324 has 24 divisors (see below), whose sum is σ = 3295183808. Its totient is φ = 704743200.

The previous prime is 1645996309. The next prime is 1645996333. The reversal of 1645996324 is 4236995461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1462 + ... + 57394.

Almost surely, 2^1645996324 is an apocalyptic number.

1645996324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1645996324 is an abundant number, since it is smaller than the sum of its proper divisors (1649187484).

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

1645996324 is a wasteful number, since it uses less digits than its factorization.

1645996324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56995 (or 56993 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 49.

The square root of 1645996324 is about 40570.8802467977. The cubic root of 1645996324 is about 1180.7092174329.

The spelling of 1645996324 in words is "one billion, six hundred forty-five million, nine hundred ninety-six thousand, three hundred twenty-four".