146778467421 has 16 divisors (see below), whose sum is σ = 195981484608. Its totient is φ = 97713945600.

The previous prime is 146778467419. The next prime is 146778467441. The reversal of 146778467421 is 124764877641.

146778467421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 146778467421 - 2¹ = 146778467419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146778467441) 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, 15810301 + ... + 15819581.

It is an arithmetic number, because the mean of its divisors is an integer number (12248842788).

Almost surely, 2^146778467421 is an apocalyptic number.

It is an amenable number.

146778467421 is a deficient number, since it is larger than the sum of its proper divisors (49203017187).

146778467421 is an equidigital number, since it uses as much as digits as its factorization.

146778467421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16172.

The product of its digits is 12644352, while the sum is 57.

The spelling of 146778467421 in words is "one hundred forty-six billion, seven hundred seventy-eight million, four hundred sixty-seven thousand, four hundred twenty-one".