78143707816744 has 16 divisors (see below), whose sum is σ = 149283970122420. Its totient is φ = 38334649117440.

The previous prime is 78143707816721. The next prime is 78143707816841. The reversal of 78143707816744 is 44761870734187.

It can be written as a sum of positive squares in 2 ways, for example, as 73703289543844 + 4440418272900 = 8585062^2 + 2107230^2 .

It is a super-2 number, since 2×78143707816744² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78143707816744.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92150598417 + ... + 92150599264.

Almost surely, 2^{78143707816744} is an apocalyptic number.

It is an amenable number.

78143707816744 is a deficient number, since it is larger than the sum of its proper divisors (71140262305676).

78143707816744 is a wasteful number, since it uses less digits than its factorization.

78143707816744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184301197740 (or 184301197736 counting only the distinct ones).

The product of its (nonzero) digits is 177020928, while the sum is 67.

The spelling of 78143707816744 in words is "seventy-eight trillion, one hundred forty-three billion, seven hundred seven million, eight hundred sixteen thousand, seven hundred forty-four".