78411713642 has 8 divisors (see below), whose sum is σ = 117619576932. Its totient is φ = 39205188000.

The previous prime is 78411713629. The next prime is 78411713647. The reversal of 78411713642 is 24631711487.

It can be written as a sum of positive squares in 2 ways, for example, as 45996951961 + 32414761681 = 214469^2 + 180041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78411713642² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78411713593 and 78411713602.

It is not an unprimeable number, because it can be changed into a prime (78411713647) by changing a digit.

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, 172109 + ... + 431792.

Almost surely, 2^78411713642 is an apocalyptic number.

78411713642 is a deficient number, since it is larger than the sum of its proper divisors (39207863290).

78411713642 is a wasteful number, since it uses less digits than its factorization.

78411713642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668824.

The product of its digits is 225792, while the sum is 44.

The spelling of 78411713642 in words is "seventy-eight billion, four hundred eleven million, seven hundred thirteen thousand, six hundred forty-two".