1291394651700 has 72 divisors (see below), whose sum is σ = 3736804947232. Its totient is φ = 344337828480.

The previous prime is 1291394651699. The next prime is 1291394651707. The reversal of 1291394651700 is 71564931921.

It is a self number, because there is not a number n which added to its sum of digits gives 1291394651700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291394651707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2899287 + ... + 3314913.

Almost surely, 2^{1291394651700} is an apocalyptic number.

1291394651700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291394651700 is an abundant number, since it is smaller than the sum of its proper divisors (2445410295532).

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

1291394651700 is a wasteful number, since it uses less digits than its factorization.

1291394651700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426001 (or 425994 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 1291394651700 in words is "one trillion, two hundred ninety-one billion, three hundred ninety-four million, six hundred fifty-one thousand, seven hundred".