1291273044360 has 128 divisors (see below), whose sum is σ = 4172108532480. Its totient is φ = 317828717568.

The previous prime is 1291273044331. The next prime is 1291273044409. The reversal of 1291273044360 is 634403721921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33172669 + ... + 33211571.

It is an arithmetic number, because the mean of its divisors is an integer number (32594597910).

Almost surely, 2^{1291273044360} is an apocalyptic number.

1291273044360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291273044360 is an abundant number, since it is smaller than the sum of its proper divisors (2880835488120).

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

1291273044360 is a wasteful number, since it uses less digits than its factorization.

1291273044360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60207 (or 60203 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 1291273044360 in words is "one trillion, two hundred ninety-one billion, two hundred seventy-three million, forty-four thousand, three hundred sixty".