1309727978874 has 256 divisors, whose sum is σ = 3531921408000. Its totient is φ = 359323159104.

The previous prime is 1309727978789. The next prime is 1309727978939. The reversal of 1309727978874 is 4788797279031.

1309727978874 is a `hidden beast` number, since 130 + 97 + 279 + 78 + 8 + 74 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 46124109 + ... + 46152495.

It is an arithmetic number, because the mean of its divisors is an integer number (13796568000).

Almost surely, 2^{1309727978874} is an apocalyptic number.

1309727978874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1309727978874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765960704000).

1309727978874 is an abundant number, since it is smaller than the sum of its proper divisors (2222193429126).

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

1309727978874 is a wasteful number, since it uses less digits than its factorization.

1309727978874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28519 (or 28499 counting only the distinct ones).

The product of its (nonzero) digits is 298722816, while the sum is 72.

The spelling of 1309727978874 in words is "one trillion, three hundred nine billion, seven hundred twenty-seven million, nine hundred seventy-eight thousand, eight hundred seventy-four".