78218661427514 has 16 divisors (see below), whose sum is σ = 121116498155520. Its totient is φ = 37846573127280.

The previous prime is 78218661427477. The next prime is 78218661427519. The reversal of 78218661427514 is 41572416681287.

It is a super-2 number, since 2×78218661427514² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is not an unprimeable number, because it can be changed into a prime (78218661427519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17407949 + ... + 21435344.

It is an arithmetic number, because the mean of its divisors is an integer number (7569781134720).

Almost surely, 2^{78218661427514} is an apocalyptic number.

78218661427514 is a deficient number, since it is larger than the sum of its proper divisors (42897836728006).

78218661427514 is a wasteful number, since it uses less digits than its factorization.

78218661427514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38875805.

The product of its digits is 36126720, while the sum is 62.

The spelling of 78218661427514 in words is "seventy-eight trillion, two hundred eighteen billion, six hundred sixty-one million, four hundred twenty-seven thousand, five hundred fourteen".