19771091142544 has 80 divisors (see below), whose sum is σ = 46393056904320. Its totient is φ = 7981601080320.

The previous prime is 19771091142511. The next prime is 19771091142547. The reversal of 19771091142544 is 44524119017791.

It is a super-2 number, since 2×19771091142544² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19771091142547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74100474 + ... + 74366809.

It is an arithmetic number, because the mean of its divisors is an integer number (579913211304).

Almost surely, 2^{19771091142544} is an apocalyptic number.

19771091142544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19771091142544 is an abundant number, since it is smaller than the sum of its proper divisors (26621965761776).

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

19771091142544 is a wasteful number, since it uses less digits than its factorization.

19771091142544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148467368 (or 148467362 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 19771091142544 in words is "nineteen trillion, seven hundred seventy-one billion, ninety-one million, one hundred forty-two thousand, five hundred forty-four".