147421789781 has 16 divisors (see below), whose sum is σ = 170208689280. Its totient is φ = 125067412800.

The previous prime is 147421789771. The next prime is 147421789783. The reversal of 147421789781 is 187987124741.

147421789781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 147421789781 - 2¹⁰ = 147421788757 is a prime.

It is a super-2 number, since 2×147421789781² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 147421789781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147421789783) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2112830 + ... + 2181488.

It is an arithmetic number, because the mean of its divisors is an integer number (10638043080).

Almost surely, 2^147421789781 is an apocalyptic number.

It is an amenable number.

147421789781 is a deficient number, since it is larger than the sum of its proper divisors (22786899499).

147421789781 is a wasteful number, since it uses less digits than its factorization.

147421789781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71804.

The product of its digits is 6322176, while the sum is 59.

The spelling of 147421789781 in words is "one hundred forty-seven billion, four hundred twenty-one million, seven hundred eighty-nine thousand, seven hundred eighty-one".