12146491021840 has 40 divisors (see below), whose sum is σ = 32274961859520. Its totient is φ = 4164511207296.

The previous prime is 12146491021817. The next prime is 12146491021897. The reversal of 12146491021840 is 4812019464121.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10845080710 + ... + 10845081829.

It is an arithmetic number, because the mean of its divisors is an integer number (806874046488).

Almost surely, 2^{12146491021840} is an apocalyptic number.

12146491021840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12146491021840 is an abundant number, since it is smaller than the sum of its proper divisors (20128470837680).

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

12146491021840 is a wasteful number, since it uses less digits than its factorization.

12146491021840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21690162559 (or 21690162553 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 12146491021840 in words is "twelve trillion, one hundred forty-six billion, four hundred ninety-one million, twenty-one thousand, eight hundred forty".