1206438457980 has 72 divisors (see below), whose sum is σ = 3929542415568. Its totient is φ = 275757361152.

The previous prime is 1206438457957. The next prime is 1206438457981. The reversal of 1206438457980 is 897548346021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206438457980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206438457981) 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, 205173669 + ... + 205179548.

It is an arithmetic number, because the mean of its divisors is an integer number (54576977994).

It is a 1-persistent number, because it is pandigital, but 2⋅1206438457980 = 2412876915960 is not.

Almost surely, 2^{1206438457980} is an apocalyptic number.

1206438457980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1206438457980 is an abundant number, since it is smaller than the sum of its proper divisors (2723103957588).

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

1206438457980 is a wasteful number, since it uses less digits than its factorization.

1206438457980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410353243 (or 410353234 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 1206438457980 in words is "one trillion, two hundred six billion, four hundred thirty-eight million, four hundred fifty-seven thousand, nine hundred eighty".