123545411220 has 96 divisors (see below), whose sum is σ = 431285815296. Its totient is φ = 25671772800.

The previous prime is 123545411173. The next prime is 123545411221. The reversal of 123545411220 is 22114545321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123545411221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13366096 + ... + 13375335.

It is an arithmetic number, because the mean of its divisors is an integer number (4492560576).

Almost surely, 2^123545411220 is an apocalyptic number.

123545411220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123545411220 is an abundant number, since it is smaller than the sum of its proper divisors (307740404076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123545411220 is a wasteful number, since it uses less digits than its factorization.

123545411220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26741461 (or 26741459 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 123545411220 its reverse (22114545321), we get a palindrome (145659956541).

The spelling of 123545411220 in words is "one hundred twenty-three billion, five hundred forty-five million, four hundred eleven thousand, two hundred twenty".