123345401653 has 4 divisors (see below), whose sum is σ = 123349799340. Its totient is φ = 123341003968.

The previous prime is 123345401633. The next prime is 123345401717. The reversal of 123345401653 is 356104543321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 356104543321 = 1301 ⋅273716021.

It can be written as a sum of positive squares in 2 ways, for example, as 1221712209 + 122123689444 = 34953^2 + 349462^2 .

It is a cyclic number.

It is not a de Polignac number, because 123345401653 - 2¹³ = 123345393461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123345401633) 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, 2156500 + ... + 2212957.

It is an arithmetic number, because the mean of its divisors is an integer number (30837449835).

Almost surely, 2^123345401653 is an apocalyptic number.

It is an amenable number.

123345401653 is a deficient number, since it is larger than the sum of its proper divisors (4397687).

123345401653 is an equidigital number, since it uses as much as digits as its factorization.

123345401653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397686.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 123345401653 its reverse (356104543321), we get a palindrome (479449944974).

The spelling of 123345401653 in words is "one hundred twenty-three billion, three hundred forty-five million, four hundred one thousand, six hundred fifty-three".