1553166123 has 32 divisors (see below), whose sum is σ = 2171258880. Its totient is φ = 986446080.

The previous prime is 1553166107. The next prime is 1553166133. The reversal of 1553166123 is 3216613551.

It is not a de Polignac number, because 1553166123 - 2⁴ = 1553166107 is a prime.

It is a super-3 number, since 3×1553166123³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1553166133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1770561 + ... + 1771437.

It is an arithmetic number, because the mean of its divisors is an integer number (67851840).

Almost surely, 2^1553166123 is an apocalyptic number.

1553166123 is a deficient number, since it is larger than the sum of its proper divisors (618092757).

1553166123 is a wasteful number, since it uses less digits than its factorization.

1553166123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187.

The product of its digits is 16200, while the sum is 33.

The square root of 1553166123 is about 39410.2286595752. The cubic root of 1553166123 is about 1158.0819777545.

Adding to 1553166123 its reverse (3216613551), we get a palindrome (4769779674).

The spelling of 1553166123 in words is "one billion, five hundred fifty-three million, one hundred sixty-six thousand, one hundred twenty-three".