1645764468 has 48 divisors (see below), whose sum is σ = 3889389504. Its totient is φ = 541578240.

The previous prime is 1645764457. The next prime is 1645764469. The reversal of 1645764468 is 8644675461.

It is a self number, because there is not a number n which added to its sum of digits gives 1645764468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645764469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535071 + ... + 538137.

It is an arithmetic number, because the mean of its divisors is an integer number (81028948).

Almost surely, 2^1645764468 is an apocalyptic number.

It is an amenable number.

1645764468 is an abundant number, since it is smaller than the sum of its proper divisors (2243625036).

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

1645764468 is a wasteful number, since it uses less digits than its factorization.

1645764468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632 (or 3630 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The square root of 1645764468 is about 40568.0227272664. The cubic root of 1645764468 is about 1180.6537763672.

The spelling of 1645764468 in words is "one billion, six hundred forty-five million, seven hundred sixty-four thousand, four hundred sixty-eight".