143957761972 has 12 divisors (see below), whose sum is σ = 252319108356. Its totient is φ = 71866588160.

The previous prime is 143957761949. The next prime is 143957762027. The reversal of 143957761972 is 279167759341.

It can be written as a sum of positive squares in 2 ways, for example, as 64193316496 + 79764445476 = 253364^2 + 282426^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 143957761972.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28070323 + ... + 28075450.

It is an arithmetic number, because the mean of its divisors is an integer number (21026592363).

Almost surely, 2^143957761972 is an apocalyptic number.

It is an amenable number.

143957761972 is a deficient number, since it is larger than the sum of its proper divisors (108361346384).

143957761972 is a wasteful number, since it uses less digits than its factorization.

143957761972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56146418 (or 56146416 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 61.

The spelling of 143957761972 in words is "one hundred forty-three billion, nine hundred fifty-seven million, seven hundred sixty-one thousand, nine hundred seventy-two".