1645425222156 has 36 divisors (see below), whose sum is σ = 4302692394000. Its totient is φ = 529562140128.

The previous prime is 1645425222079. The next prime is 1645425222211. The reversal of 1645425222156 is 6512225245461.

1645425222156 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 425 + 2 + 2 + 215 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 788037856 + ... + 788039943.

Almost surely, 2^{1645425222156} is an apocalyptic number.

It is an amenable number.

1645425222156 is an abundant number, since it is smaller than the sum of its proper divisors (2657267171844).

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

1645425222156 is a wasteful number, since it uses less digits than its factorization.

1645425222156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576077838 (or 1576077833 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 1645425222156 in words is "one trillion, six hundred forty-five billion, four hundred twenty-five million, two hundred twenty-two thousand, one hundred fifty-six".