12510051440 has 80 divisors (see below), whose sum is σ = 31947955200. Its totient is φ = 4534523136.

The previous prime is 12510051439. The next prime is 12510051461. The reversal of 12510051440 is 4415001521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143960 + ... + 213879.

It is an arithmetic number, because the mean of its divisors is an integer number (399349440).

Almost surely, 2^12510051440 is an apocalyptic number.

12510051440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12510051440 is an abundant number, since it is smaller than the sum of its proper divisors (19437903760).

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

12510051440 is a wasteful number, since it uses less digits than its factorization.

12510051440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357894 (or 357888 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12510051440 its reverse (4415001521), we get a palindrome (16925052961).

The spelling of 12510051440 in words is "twelve billion, five hundred ten million, fifty-one thousand, four hundred forty".