1645113553152 has 108 divisors (see below), whose sum is σ = 4577044324944. Its totient is φ = 524528829440.

The previous prime is 1645113553151. The next prime is 1645113553249. The reversal of 1645113553152 is 2513553115461.

It is not an unprimeable number, because it can be changed into a prime (1645113553151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1618374 + ... + 2430917.

Almost surely, 2^{1645113553152} is an apocalyptic number.

1645113553152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1645113553152 is an abundant number, since it is smaller than the sum of its proper divisors (2931930771792).

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

1645113553152 is an equidigital number, since it uses as much as digits as its factorization.

1645113553152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049356 (or 4049319 counting only the distinct ones).

The product of its digits is 270000, while the sum is 42.

The spelling of 1645113553152 in words is "one trillion, six hundred forty-five billion, one hundred thirteen million, five hundred fifty-three thousand, one hundred fifty-two".