19557842457270 has 128 divisors (see below), whose sum is σ = 53307287631360. Its totient is φ = 4552518297600.

The previous prime is 19557842457199. The next prime is 19557842457301. The reversal of 19557842457270 is 7275424875591.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1640670 + ... + 6465870.

It is an arithmetic number, because the mean of its divisors is an integer number (416463184620).

Almost surely, 2^{19557842457270} is an apocalyptic number.

19557842457270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19557842457270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26653643815680).

19557842457270 is an abundant number, since it is smaller than the sum of its proper divisors (33749445174090).

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

19557842457270 is a wasteful number, since it uses less digits than its factorization.

19557842457270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825790.

The product of its (nonzero) digits is 197568000, while the sum is 66.

The spelling of 19557842457270 in words is "nineteen trillion, five hundred fifty-seven billion, eight hundred forty-two million, four hundred fifty-seven thousand, two hundred seventy".