123545263261 has 16 divisors (see below), whose sum is σ = 141815228800. Its totient is φ = 105431388480.

The previous prime is 123545263241. The next prime is 123545263271. The reversal of 123545263261 is 162362545321.

It is a cyclic number.

It is not a de Polignac number, because 123545263261 - 2⁵ = 123545263229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123545263211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1576570 + ... + 1653076.

It is an arithmetic number, because the mean of its divisors is an integer number (8863451800).

Almost surely, 2^123545263261 is an apocalyptic number.

It is an amenable number.

123545263261 is a deficient number, since it is larger than the sum of its proper divisors (18269965539).

123545263261 is an equidigital number, since it uses as much as digits as its factorization.

123545263261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77524.

The product of its digits is 259200, while the sum is 40.

The spelling of 123545263261 in words is "one hundred twenty-three billion, five hundred forty-five million, two hundred sixty-three thousand, two hundred sixty-one".