1223828621678 has 32 divisors (see below), whose sum is σ = 1989233243424. Its totient is φ = 561344556672.

The previous prime is 1223828621671. The next prime is 1223828621693. The reversal of 1223828621678 is 8761268283221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223828621671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3101276 + ... + 3473552.

It is an arithmetic number, because the mean of its divisors is an integer number (62163538857).

Almost surely, 2^{1223828621678} is an apocalyptic number.

1223828621678 is a deficient number, since it is larger than the sum of its proper divisors (765404621746).

1223828621678 is a wasteful number, since it uses less digits than its factorization.

1223828621678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373076.

The product of its digits is 6193152, while the sum is 56.

The spelling of 1223828621678 in words is "one trillion, two hundred twenty-three billion, eight hundred twenty-eight million, six hundred twenty-one thousand, six hundred seventy-eight".