1645130424 has 64 divisors (see below), whose sum is σ = 4713638400. Its totient is φ = 468710784.

The previous prime is 1645130381. The next prime is 1645130437. The reversal of 1645130424 is 4240315461.

It is a super-2 number, since 2×1645130424² = 5412908223940839552, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1645130391 and 1645130400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46674 + ... + 73950.

It is an arithmetic number, because the mean of its divisors is an integer number (73650600).

Almost surely, 2^1645130424 is an apocalyptic number.

1645130424 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 1645130424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2356819200).

1645130424 is an abundant number, since it is smaller than the sum of its proper divisors (3068507976).

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

1645130424 is a wasteful number, since it uses less digits than its factorization.

1645130424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27652 (or 27648 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1645130424 is about 40560.2073959195. The cubic root of 1645130424 is about 1180.5021381041.

Adding to 1645130424 its reverse (4240315461), we get a palindrome (5885445885).

The spelling of 1645130424 in words is "one billion, six hundred forty-five million, one hundred thirty thousand, four hundred twenty-four".