78487742378011 has 8 divisors (see below), whose sum is σ = 82619127360000. Its totient is φ = 74356402513320.

The previous prime is 78487742378009. The next prime is 78487742378083. The reversal of 78487742378011 is 11087324778487.

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

It is a cyclic number.

It is not a de Polignac number, because 78487742378011 - 2¹ = 78487742378009 is a prime.

It is a super-2 number, since 2×78487742378011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78487742348011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7679011 + ... + 14694988.

It is an arithmetic number, because the mean of its divisors is an integer number (10327390920000).

Almost surely, 2^{78487742378011} is an apocalyptic number.

78487742378011 is a deficient number, since it is larger than the sum of its proper divisors (4131384981989).

78487742378011 is a wasteful number, since it uses less digits than its factorization.

78487742378011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22558649.

The product of its (nonzero) digits is 118013952, while the sum is 67.

The spelling of 78487742378011 in words is "seventy-eight trillion, four hundred eighty-seven billion, seven hundred forty-two million, three hundred seventy-eight thousand, eleven".