12651512502640 has 80 divisors (see below), whose sum is σ = 32126456962656. Its totient is φ = 4595156352000.

The previous prime is 12651512502637. The next prime is 12651512502649. The reversal of 12651512502640 is 4620521515621.

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

It is a super-3 number, since 3×12651512502640³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 12651512502593 and 12651512502602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651512502649) 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 15 ways as a sum of consecutive naturals, for example, 7676511 + ... + 9177790.

Almost surely, 2^{12651512502640} is an apocalyptic number.

12651512502640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12651512502640 is an abundant number, since it is smaller than the sum of its proper divisors (19474944460016).

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

12651512502640 is a wasteful number, since it uses less digits than its factorization.

12651512502640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16855178 (or 16855172 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 12651512502640 in words is "twelve trillion, six hundred fifty-one billion, five hundred twelve million, five hundred two thousand, six hundred forty".