1294516640640 has 64 divisors (see below), whose sum is σ = 4126271798160. Its totient is φ = 345204436992.

The previous prime is 1294516640533. The next prime is 1294516640701. The reversal of 1294516640640 is 460466154921.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1294516640640.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 337111789 + ... + 337115628.

Almost surely, 2^{1294516640640} is an apocalyptic number.

1294516640640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1294516640640 is an abundant number, since it is smaller than the sum of its proper divisors (2831755157520).

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

1294516640640 is an equidigital number, since it uses as much as digits as its factorization.

1294516640640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674227439 (or 674227427 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 1294516640640 in words is "one trillion, two hundred ninety-four billion, five hundred sixteen million, six hundred forty thousand, six hundred forty".