1281664166496 has 48 divisors (see below), whose sum is σ = 3844992501504. Its totient is φ = 366189761664.

The previous prime is 1281664166417. The next prime is 1281664166507. The reversal of 1281664166496 is 6946614661821.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 953618500 + ... + 953619843.

It is an arithmetic number, because the mean of its divisors is an integer number (80104010448).

Almost surely, 2^{1281664166496} is an apocalyptic number.

1281664166496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1281664166496 is an abundant number, since it is smaller than the sum of its proper divisors (2563328335008).

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

1281664166496 is a wasteful number, since it uses less digits than its factorization.

1281664166496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907238363 (or 1907238355 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 60.

The spelling of 1281664166496 in words is "one trillion, two hundred eighty-one billion, six hundred sixty-four million, one hundred sixty-six thousand, four hundred ninety-six".