1223250342640 has 80 divisors (see below), whose sum is σ = 2852260345440. Its totient is φ = 487889740800.

The previous prime is 1223250342541. The next prime is 1223250342673. The reversal of 1223250342640 is 462430523221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1223250342596 and 1223250342605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118745490 + ... + 118755790.

It is an arithmetic number, because the mean of its divisors is an integer number (35653254318).

Almost surely, 2^{1223250342640} is an apocalyptic number.

1223250342640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223250342640 is an abundant number, since it is smaller than the sum of its proper divisors (1629010002800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223250342640 is a wasteful number, since it uses less digits than its factorization.

1223250342640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14450 (or 14444 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 1223250342640 its reverse (462430523221), we get a palindrome (1685680865861).

The spelling of 1223250342640 in words is "one trillion, two hundred twenty-three billion, two hundred fifty million, three hundred forty-two thousand, six hundred forty".