1234456677779 has 16 divisors (see below), whose sum is σ = 1341934691328. Its totient is φ = 1128768724512.

The previous prime is 1234456677749. The next prime is 1234456677799. The reversal of 1234456677779 is 9777766544321.

It is not a de Polignac number, because 1234456677779 - 2⁸ = 1234456677523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1234456677719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29450174 + ... + 29492060.

It is an arithmetic number, because the mean of its divisors is an integer number (83870918208).

Almost surely, 2^{1234456677779} is an apocalyptic number.

1234456677779 is a deficient number, since it is larger than the sum of its proper divisors (107478013549).

1234456677779 is a wasteful number, since it uses less digits than its factorization.

1234456677779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63194.

The product of its digits is 373403520, while the sum is 68.

The spelling of 1234456677779 in words is "one trillion, two hundred thirty-four billion, four hundred fifty-six million, six hundred seventy-seven thousand, seven hundred seventy-nine".