1345440305520 has 120 divisors (see below), whose sum is σ = 4518874638096. Its totient is φ = 358749333504.

The previous prime is 1345440305441. The next prime is 1345440305591. The reversal of 1345440305520 is 255030445431.

1345440305520 is a `hidden beast` number, since 1 + 34 + 5 + 4 + 40 + 30 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7829967 + ... + 7999953.

Almost surely, 2^{1345440305520} is an apocalyptic number.

1345440305520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345440305520 is an abundant number, since it is smaller than the sum of its proper divisors (3173434332576).

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

1345440305520 is a wasteful number, since it uses less digits than its factorization.

1345440305520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180999 (or 180990 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The spelling of 1345440305520 in words is "one trillion, three hundred forty-five billion, four hundred forty million, three hundred five thousand, five hundred twenty".