1545205645512 has 192 divisors, whose sum is σ = 4464330390000. Its totient is φ = 481140621312.

The previous prime is 1545205645441. The next prime is 1545205645523. The reversal of 1545205645512 is 2155465025451.

It is a happy number.

1545205645512 is a `hidden beast` number, since 1 + 5 + 4 + 5 + 20 + 564 + 55 + 12 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 779311121796 + 765894523716 = 882786^2 + 875154^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 316055164 + ... + 316060052.

Almost surely, 2^{1545205645512} is an apocalyptic number.

1545205645512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1545205645512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2232165195000).

1545205645512 is an abundant number, since it is smaller than the sum of its proper divisors (2919124744488).

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

1545205645512 is a wasteful number, since it uses less digits than its factorization.

1545205645512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800 (or 6793 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 45.

The spelling of 1545205645512 in words is "one trillion, five hundred forty-five billion, two hundred five million, six hundred forty-five thousand, five hundred twelve".