1645605155133 has 16 divisors (see below), whose sum is σ = 2450565351040. Its totient is φ = 1091385798912.

The previous prime is 1645605155123. The next prime is 1645605155143. The reversal of 1645605155133 is 3315515065461.

1645605155133 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 60 + 5 + 1 + 551 + 33 = 666.

It is an interprime number because it is at equal distance from previous prime (1645605155123) and next prime (1645605155143).

It is not a de Polignac number, because 1645605155133 - 2⁶ = 1645605155069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645605155113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157892041 + ... + 157902462.

It is an arithmetic number, because the mean of its divisors is an integer number (153160334440).

Almost surely, 2^{1645605155133} is an apocalyptic number.

It is an amenable number.

1645605155133 is a deficient number, since it is larger than the sum of its proper divisors (804960195907).

1645605155133 is a wasteful number, since it uses less digits than its factorization.

1645605155133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315794705 (or 315794699 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 1645605155133 in words is "one trillion, six hundred forty-five billion, six hundred five million, one hundred fifty-five thousand, one hundred thirty-three".