1234555677789 has 16 divisors (see below), whose sum is σ = 1946097621120. Its totient is φ = 681134166720.

The previous prime is 1234555677787. The next prime is 1234555677829. The reversal of 1234555677789 is 9877765554321.

It is not a de Polignac number, because 1234555677789 - 2¹ = 1234555677787 is a prime.

It is a super-2 number, since 2×1234555677789² (a number of 25 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234555677787) 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, 1013591902 + ... + 1013593119.

It is an arithmetic number, because the mean of its divisors is an integer number (121631101320).

Almost surely, 2^{1234555677789} is an apocalyptic number.

It is an amenable number.

1234555677789 is a deficient number, since it is larger than the sum of its proper divisors (711541943331).

1234555677789 is a wasteful number, since it uses less digits than its factorization.

1234555677789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027185060.

The product of its digits is 444528000, while the sum is 69.

The spelling of 1234555677789 in words is "one trillion, two hundred thirty-four billion, five hundred fifty-five million, six hundred seventy-seven thousand, seven hundred eighty-nine".