1345556780 has 12 divisors (see below), whose sum is σ = 2825669280. Its totient is φ = 538222704.

The previous prime is 1345556759. The next prime is 1345556789. The reversal of 1345556780 is 876555431.

It is not an unprimeable number, because it can be changed into a prime (1345556789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33638900 + ... + 33638939.

It is an arithmetic number, because the mean of its divisors is an integer number (235472440).

Almost surely, 2^1345556780 is an apocalyptic number.

1345556780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345556780 is an abundant number, since it is smaller than the sum of its proper divisors (1480112500).

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

1345556780 is a wasteful number, since it uses less digits than its factorization.

1345556780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67277848 (or 67277846 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The square root of 1345556780 is about 36681.8317427034. The cubic root of 1345556780 is about 1103.9956011780.

The spelling of 1345556780 in words is "one billion, three hundred forty-five million, five hundred fifty-six thousand, seven hundred eighty".