1273898852640 has 288 divisors, whose sum is σ = 4468302558720. Its totient is φ = 330256300032.

The previous prime is 1273898852581. The next prime is 1273898852641. The reversal of 1273898852640 is 462588983721.

1273898852640 is a `hidden beast` number, since 1 + 27 + 3 + 8 + 9 + 88 + 526 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is not an unprimeable number, because it can be changed into a prime (1273898852641) 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, 70267257 + ... + 70285383.

It is an arithmetic number, because the mean of its divisors is an integer number (15514939440).

It is a 1-persistent number, because it is pandigital, but 2⋅1273898852640 = 2547797705280 is not.

Almost surely, 2^{1273898852640} is an apocalyptic number.

1273898852640 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 1273898852640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2234151279360).

1273898852640 is an abundant number, since it is smaller than the sum of its proper divisors (3194403706080).

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

1273898852640 is a wasteful number, since it uses less digits than its factorization.

1273898852640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19504 (or 19493 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 1273898852640 in words is "one trillion, two hundred seventy-three billion, eight hundred ninety-eight million, eight hundred fifty-two thousand, six hundred forty".