146637731138 has 4 divisors (see below), whose sum is σ = 219956596710. Its totient is φ = 73318865568.

The previous prime is 146637731129. The next prime is 146637731159. The reversal of 146637731138 is 831137736641.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 78872790649 + 67764940489 = 280843^2 + 260317^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36659432783 + ... + 36659432786.

Almost surely, 2^146637731138 is an apocalyptic number.

146637731138 is a deficient number, since it is larger than the sum of its proper divisors (73318865572).

146637731138 is an equidigital number, since it uses as much as digits as its factorization.

146637731138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73318865571.

The product of its digits is 1524096, while the sum is 50.

The spelling of 146637731138 in words is "one hundred forty-six billion, six hundred thirty-seven million, seven hundred thirty-one thousand, one hundred thirty-eight".