123434411551 has 16 divisors (see below), whose sum is σ = 140186334240. Its totient is φ = 107653553280.

The previous prime is 123434411539. The next prime is 123434411561. The reversal of 123434411551 is 155114434321.

It is a cyclic number.

It is not a de Polignac number, because 123434411551 - 2⁷ = 123434411423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123434411501) 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, 1182216 + ... + 1282381.

It is an arithmetic number, because the mean of its divisors is an integer number (8761645890).

Almost surely, 2^123434411551 is an apocalyptic number.

123434411551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123434411551 is a deficient number, since it is larger than the sum of its proper divisors (16751922689).

123434411551 is a wasteful number, since it uses less digits than its factorization.

123434411551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464794.

The product of its digits is 28800, while the sum is 34.

Adding to 123434411551 its reverse (155114434321), we get a palindrome (278548845872).

The spelling of 123434411551 in words is "one hundred twenty-three billion, four hundred thirty-four million, four hundred eleven thousand, five hundred fifty-one".