1645745354712 has 64 divisors (see below), whose sum is σ = 4677829200000. Its totient is φ = 535824065952.

The previous prime is 1645745354707. The next prime is 1645745354783. The reversal of 1645745354712 is 2174535475461.

1645745354712 is a `hidden beast` number, since 1 + 6 + 4 + 57 + 4 + 535 + 47 + 12 = 666.

It is a super-2 number, since 2×1645745354712² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88585962 + ... + 88604537.

It is an arithmetic number, because the mean of its divisors is an integer number (73091081250).

Almost surely, 2^{1645745354712} is an apocalyptic number.

1645745354712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1645745354712 is an abundant number, since it is smaller than the sum of its proper divisors (3032083845288).

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

1645745354712 is a wasteful number, since it uses less digits than its factorization.

1645745354712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177190557 (or 177190547 counting only the distinct ones).

The product of its digits is 14112000, while the sum is 54.

The spelling of 1645745354712 in words is "one trillion, six hundred forty-five billion, seven hundred forty-five million, three hundred fifty-four thousand, seven hundred twelve".