1345555779 has 16 divisors (see below), whose sum is σ = 1804836000. Its totient is φ = 891671040.

The previous prime is 1345555777. The next prime is 1345555781. The reversal of 1345555779 is 9775555431.

It is an interprime number because it is at equal distance from previous prime (1345555777) and next prime (1345555781).

It is not a de Polignac number, because 1345555779 - 2¹ = 1345555777 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1345555777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488097 + ... + 490845.

It is an arithmetic number, because the mean of its divisors is an integer number (112802250).

Almost surely, 2^1345555779 is an apocalyptic number.

1345555779 is a deficient number, since it is larger than the sum of its proper divisors (459280221).

1345555779 is a wasteful number, since it uses less digits than its factorization.

1345555779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670.

The product of its digits is 3307500, while the sum is 51.

The square root of 1345555779 is about 36681.8180983440. The cubic root of 1345555779 is about 1103.9953274127.

The spelling of 1345555779 in words is "one billion, three hundred forty-five million, five hundred fifty-five thousand, seven hundred seventy-nine".