1645011412 has 24 divisors (see below), whose sum is σ = 3305766240. Its totient is φ = 708377760.

The previous prime is 1645011383. The next prime is 1645011439. The reversal of 1645011412 is 2141105461.

It is a super-2 number, since 2×1645011412² = 5412125091220467488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 983023 + ... + 984694.

It is an arithmetic number, because the mean of its divisors is an integer number (137740260).

Almost surely, 2^1645011412 is an apocalyptic number.

It is an amenable number.

1645011412 is an abundant number, since it is smaller than the sum of its proper divisors (1660754828).

1645011412 is a wasteful number, since it uses less digits than its factorization.

1645011412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967751 (or 1967749 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1645011412 is about 40558.7402664333. The cubic root of 1645011412 is about 1180.4736707951.

Adding to 1645011412 its reverse (2141105461), we get a palindrome (3786116873).

The spelling of 1645011412 in words is "one billion, six hundred forty-five million, eleven thousand, four hundred twelve".