1234455567779 has 12 divisors (see below), whose sum is σ = 1437582626424. Its totient is φ = 1056938135904.

The previous prime is 1234455567773. The next prime is 1234455567791. The reversal of 1234455567779 is 9777655544321.

It is not a de Polignac number, because 1234455567779 - 2⁸ = 1234455567523 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1234455567773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13843634 + ... + 13932519.

It is an arithmetic number, because the mean of its divisors is an integer number (119798552202).

Almost surely, 2^{1234455567779} is an apocalyptic number.

1234455567779 is a deficient number, since it is larger than the sum of its proper divisors (203127058645).

1234455567779 is an equidigital number, since it uses as much as digits as its factorization.

1234455567779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27777074 (or 27777067 counting only the distinct ones).

The product of its digits is 222264000, while the sum is 65.

The spelling of 1234455567779 in words is "one trillion, two hundred thirty-four billion, four hundred fifty-five million, five hundred sixty-seven thousand, seven hundred seventy-nine".