1645408148 has 48 divisors (see below), whose sum is σ = 3077222400. Its totient is φ = 768472320.

The previous prime is 1645408139. The next prime is 1645408153. The reversal of 1645408148 is 8418045461.

It is a happy number.

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, 483533 + ... + 486923.

It is an arithmetic number, because the mean of its divisors is an integer number (64108800).

Almost surely, 2^1645408148 is an apocalyptic number.

It is an amenable number.

1645408148 is a deficient number, since it is larger than the sum of its proper divisors (1431814252).

1645408148 is a wasteful number, since it uses less digits than its factorization.

1645408148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560 (or 3558 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 1645408148 is about 40563.6308532656. The cubic root of 1645408148 is about 1180.5685635019.

The spelling of 1645408148 in words is "one billion, six hundred forty-five million, four hundred eight thousand, one hundred forty-eight".