1645364156 has 48 divisors (see below), whose sum is σ = 3097543680. Its totient is φ = 762886080.

The previous prime is 1645364131. The next prime is 1645364173. The reversal of 1645364156 is 6514635461.

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 15 ways as a sum of consecutive naturals, for example, 469571 + ... + 473061.

It is an arithmetic number, because the mean of its divisors is an integer number (64532160).

Almost surely, 2^1645364156 is an apocalyptic number.

It is an amenable number.

1645364156 is a deficient number, since it is larger than the sum of its proper divisors (1452179524).

1645364156 is a wasteful number, since it uses less digits than its factorization.

1645364156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674 (or 3672 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 1645364156 is about 40563.0885904907. The cubic root of 1645364156 is about 1180.5580420931.

The spelling of 1645364156 in words is "one billion, six hundred forty-five million, three hundred sixty-four thousand, one hundred fifty-six".