19545795612 has 144 divisors (see below), whose sum is σ = 59026464000. Its totient is φ = 5577048288.

The previous prime is 19545795553. The next prime is 19545795613. The reversal of 19545795612 is 21659754591.

19545795612 is a `hidden beast` number, since 1 + 9 + 5 + 4 + 5 + 79 + 561 + 2 = 666.

It is a super-2 number, since 2×19545795612² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19545795613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4861339 + ... + 4865357.

It is an arithmetic number, because the mean of its divisors is an integer number (409906000).

Almost surely, 2^19545795612 is an apocalyptic number.

19545795612 is a gapful number since it is divisible by the number (12) 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 19545795612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29513232000).

19545795612 is an abundant number, since it is smaller than the sum of its proper divisors (39480668388).

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

19545795612 is a wasteful number, since it uses less digits than its factorization.

19545795612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965 (or 4950 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 54.

The spelling of 19545795612 in words is "nineteen billion, five hundred forty-five million, seven hundred ninety-five thousand, six hundred twelve".