2143939356738 has 12 divisors (see below), whose sum is σ = 4645201939638. Its totient is φ = 714646452240.

The previous prime is 2143939356737. The next prime is 2143939356739. The reversal of 2143939356738 is 8376539393412.

2143939356738 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 9 + 39 + 3 + 567 + 38 = 666.

It is an interprime number because it is at equal distance from previous prime (2143939356737) and next prime (2143939356739).

It can be written as a sum of positive squares in only one way, i.e., 1868626118529 + 275313238209 = 1366977^2 + 524703^2 .

It is not an unprimeable number, because it can be changed into a prime (2143939356737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59553871003 + ... + 59553871038.

Almost surely, 2^{2143939356738} is an apocalyptic number.

2143939356738 is an abundant number, since it is smaller than the sum of its proper divisors (2501262582900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143939356738 is a wasteful number, since it uses less digits than its factorization.

2143939356738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119107742049 (or 119107742046 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 63.

The spelling of 2143939356738 in words is "two trillion, one hundred forty-three billion, nine hundred thirty-nine million, three hundred fifty-six thousand, seven hundred thirty-eight".