1225743066638 has 8 divisors (see below), whose sum is σ = 1839106350840. Its totient is φ = 612707616360.

The previous prime is 1225743066619. The next prime is 1225743066641. The reversal of 1225743066638 is 8366603475221.

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

It is a super-2 number, since 2×1225743066638² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1225743066638.

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 3 ways as a sum of consecutive naturals, for example, 81949133 + ... + 81964088.

It is an arithmetic number, because the mean of its divisors is an integer number (229888293855).

Almost surely, 2^{1225743066638} is an apocalyptic number.

1225743066638 is a deficient number, since it is larger than the sum of its proper divisors (613363284202).

1225743066638 is a wasteful number, since it uses less digits than its factorization.

1225743066638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163916962.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 1225743066638 in words is "one trillion, two hundred twenty-five billion, seven hundred forty-three million, sixty-six thousand, six hundred thirty-eight".