1145445220520 has 16 divisors (see below), whose sum is σ = 2577251746260. Its totient is φ = 458178088192.

The previous prime is 1145445220477. The next prime is 1145445220567. The reversal of 1145445220520 is 250225445411.

It can be written as a sum of positive squares in 2 ways, for example, as 1079284120996 + 66161099524 = 1038886^2 + 257218^2 .

It is a super-2 number, since 2×1145445220520² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14318065217 + ... + 14318065296.

Almost surely, 2^{1145445220520} is an apocalyptic number.

1145445220520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145445220520 is an abundant number, since it is smaller than the sum of its proper divisors (1431806525740).

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

1145445220520 is a wasteful number, since it uses less digits than its factorization.

1145445220520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28636130524 (or 28636130520 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

The spelling of 1145445220520 in words is "one trillion, one hundred forty-five billion, four hundred forty-five million, two hundred twenty thousand, five hundred twenty".