143778230761 has 9 divisors (see below), whose sum is σ = 158041813629. Its totient is φ = 130703690700.

The previous prime is 143778230749. The next prime is 143778230777. The reversal of 143778230761 is 167032877341.

The square root of 143778230761 is 379181.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 143778230761 - 2⁹ = 143778230249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143778230741) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4153756 + ... + 4188226.

Almost surely, 2^143778230761 is an apocalyptic number.

143778230761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

143778230761 is the 379181-st square number.

143778230761 is the 189591-st centered octagonal number.

It is an amenable number.

143778230761 is a deficient number, since it is larger than the sum of its proper divisors (14263582868).

143778230761 is an frugal number, since it uses more digits than its factorization.

143778230761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68964 (or 34482 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 49.

Multiplying 143778230761 by its sum of digits (49), we get a square (7045133307289 = 2654267²).

The spelling of 143778230761 in words is "one hundred forty-three billion, seven hundred seventy-eight million, two hundred thirty thousand, seven hundred sixty-one".