1281395900496 has 80 divisors (see below), whose sum is σ = 3332411587008. Its totient is φ = 424277068800.

The previous prime is 1281395900471. The next prime is 1281395900503. The reversal of 1281395900496 is 6940095931821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25378636 + ... + 25429076.

Almost surely, 2^{1281395900496} is an apocalyptic number.

1281395900496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1281395900496 is an abundant number, since it is smaller than the sum of its proper divisors (2051015686512).

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

1281395900496 is a wasteful number, since it uses less digits than its factorization.

1281395900496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53980 (or 53974 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 57.

The spelling of 1281395900496 in words is "one trillion, two hundred eighty-one billion, three hundred ninety-five million, nine hundred thousand, four hundred ninety-six".