12146402550 has 48 divisors (see below), whose sum is σ = 30937229712. Its totient is φ = 3151497600.

The previous prime is 12146402531. The next prime is 12146402551. The reversal of 12146402550 is 5520464121.

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 (12146402551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1088721 + ... + 1099820.

It is an arithmetic number, because the mean of its divisors is an integer number (644525619).

Almost surely, 2^12146402550 is an apocalyptic number.

12146402550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12146402550 is an abundant number, since it is smaller than the sum of its proper divisors (18790827162).

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

12146402550 is a wasteful number, since it uses less digits than its factorization.

12146402550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188593 (or 2188588 counting only the distinct ones).

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

Adding to 12146402550 its reverse (5520464121), we get a palindrome (17666866671).

The spelling of 12146402550 in words is "twelve billion, one hundred forty-six million, four hundred two thousand, five hundred fifty".