12465451620 has 72 divisors (see below), whose sum is σ = 40036107384. Its totient is φ = 3128583168.

The previous prime is 12465451597. The next prime is 12465451643. The reversal of 12465451620 is 2615456421.

12465451620 is a `hidden beast` number, since 1 + 24 + 6 + 5 + 4 + 5 + 1 + 620 = 666.

It is an interprime number because it is at equal distance from previous prime (12465451597) and next prime (12465451643).

It can be written as a sum of positive squares in 4 ways, for example, as 2478247524 + 9987204096 = 49782^2 + 99936^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2033779 + ... + 2039898.

It is an arithmetic number, because the mean of its divisors is an integer number (556057047).

Almost surely, 2^12465451620 is an apocalyptic number.

12465451620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12465451620 is an abundant number, since it is smaller than the sum of its proper divisors (27570655764).

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

12465451620 is a wasteful number, since it uses less digits than its factorization.

12465451620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073709 (or 4073704 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 12465451620 in words is "twelve billion, four hundred sixty-five million, four hundred fifty-one thousand, six hundred twenty".