12499620720840 has 384 divisors, whose sum is σ = 45855781171200. Its totient is φ = 2925451584000.

The previous prime is 12499620720827. The next prime is 12499620720841. The reversal of 12499620720840 is 4802702699421.

It is a happy number.

12499620720840 is a `hidden beast` number, since 1 + 2 + 4 + 9 + 9 + 620 + 7 + 2 + 0 + 8 + 4 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (12499620720841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51314935 + ... + 51557945.

It is an arithmetic number, because the mean of its divisors is an integer number (119416096800).

Almost surely, 2^{12499620720840} is an apocalyptic number.

12499620720840 is a gapful number since it is divisible by the number (10) 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 12499620720840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22927890585600).

12499620720840 is an abundant number, since it is smaller than the sum of its proper divisors (33356160450360).

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

12499620720840 is a wasteful number, since it uses less digits than its factorization.

12499620720840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243489 (or 243482 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 12499620720840 in words is "twelve trillion, four hundred ninety-nine billion, six hundred twenty million, seven hundred twenty thousand, eight hundred forty".