1206781316700 has 144 divisors (see below), whose sum is σ = 3644028600576. Its totient is φ = 307766131200.

The previous prime is 1206781316659. The next prime is 1206781316707. The reversal of 1206781316700 is 76131876021.

It is a super-2 number, since 2×1206781316700² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206781316707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60440919 + ... + 60460881.

Almost surely, 2^{1206781316700} is an apocalyptic number.

1206781316700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206781316700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822014300288).

1206781316700 is an abundant number, since it is smaller than the sum of its proper divisors (2437247283876).

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

1206781316700 is a wasteful number, since it uses less digits than its factorization.

1206781316700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28764 (or 28757 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 1206781316700 in words is "one trillion, two hundred six billion, seven hundred eighty-one million, three hundred sixteen thousand, seven hundred".