78218219626 has 16 divisors (see below), whose sum is σ = 118883492640. Its totient is φ = 38593725040.

The previous prime is 78218219621. The next prime is 78218219647. The reversal of 78218219626 is 62691281287.

It is a super-2 number, since 2×78218219626² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78218219621) 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, 787021 + ... + 880816.

It is an arithmetic number, because the mean of its divisors is an integer number (7430218290).

Almost surely, 2^78218219626 is an apocalyptic number.

78218219626 is a deficient number, since it is larger than the sum of its proper divisors (40665273014).

78218219626 is a wasteful number, since it uses less digits than its factorization.

78218219626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668149.

The product of its digits is 1161216, while the sum is 52.

The spelling of 78218219626 in words is "seventy-eight billion, two hundred eighteen million, two hundred nineteen thousand, six hundred twenty-six".