1553223655642 has 8 divisors (see below), whose sum is σ = 2329843160736. Its totient is φ = 776609268732.

The previous prime is 1553223655597. The next prime is 1553223655649. The reversal of 1553223655642 is 2465563223551.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1553223655649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399928 + ... + 1807315.

It is an arithmetic number, because the mean of its divisors is an integer number (291230395092).

Almost surely, 2^{1553223655642} is an apocalyptic number.

1553223655642 is a deficient number, since it is larger than the sum of its proper divisors (776619505094).

1553223655642 is a wasteful number, since it uses less digits than its factorization.

1553223655642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559092.

The product of its digits is 6480000, while the sum is 49.

The spelling of 1553223655642 in words is "one trillion, five hundred fifty-three billion, two hundred twenty-three million, six hundred fifty-five thousand, six hundred forty-two".