12040261464 has 128 divisors (see below), whose sum is σ = 38542579200. Its totient is φ = 3042800640.

The previous prime is 12040261459. The next prime is 12040261489. The reversal of 12040261464 is 46416204021.

It is a happy number.

It is a super-2 number, since 2×12040261464² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19669 + ... + 156420.

It is an arithmetic number, because the mean of its divisors is an integer number (301113900).

Almost surely, 2^12040261464 is an apocalyptic number.

12040261464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12040261464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19271289600).

12040261464 is an abundant number, since it is smaller than the sum of its proper divisors (26502317736).

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

12040261464 is a wasteful number, since it uses less digits than its factorization.

12040261464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176153 (or 176149 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 12040261464 its reverse (46416204021), we get a palindrome (58456465485).

The spelling of 12040261464 in words is "twelve billion, forty million, two hundred sixty-one thousand, four hundred sixty-four".