146139289477 has 4 divisors (see below), whose sum is σ = 148535015596. Its totient is φ = 143743563360.

The previous prime is 146139289441. The next prime is 146139289493. The reversal of 146139289477 is 774982931641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774982931641 = 17 ⋅45587231273.

It can be written as a sum of positive squares in 2 ways, for example, as 29579184196 + 116560105281 = 171986^2 + 341409^2 .

It is a cyclic number.

It is not a de Polignac number, because 146139289477 - 2⁷ = 146139289349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61), and also a Moran number because the ratio is a prime number: 2395726057 = 146139289477 / (1 + 4 + 6 + 1 + 3 + 9 + 2 + 8 + 9 + 4 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146139259477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197862968 + ... + 1197863089.

It is an arithmetic number, because the mean of its divisors is an integer number (37133753899).

Almost surely, 2^146139289477 is an apocalyptic number.

It is an amenable number.

146139289477 is a deficient number, since it is larger than the sum of its proper divisors (2395726119).

146139289477 is an equidigital number, since it uses as much as digits as its factorization.

146139289477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395726118.

The product of its digits is 18289152, while the sum is 61.

The spelling of 146139289477 in words is "one hundred forty-six billion, one hundred thirty-nine million, two hundred eighty-nine thousand, four hundred seventy-seven".