12400155620 has 48 divisors (see below), whose sum is σ = 27536011776. Its totient is φ = 4682976000.

The previous prime is 12400155619. The next prime is 12400155637. The reversal of 12400155620 is 2655100421.

It is a self number, because there is not a number n which added to its sum of digits gives 12400155620.

It is an unprimeable number.

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, 218486 + ... + 269325.

It is an arithmetic number, because the mean of its divisors is an integer number (573666912).

Almost surely, 2^12400155620 is an apocalyptic number.

12400155620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400155620 is an abundant number, since it is smaller than the sum of its proper divisors (15135856156).

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

12400155620 is a wasteful number, since it uses less digits than its factorization.

12400155620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487892 (or 487890 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 12400155620 in words is "twelve billion, four hundred million, one hundred fifty-five thousand, six hundred twenty".