123633980261 has 16 divisors (see below), whose sum is σ = 135401450688. Its totient is φ = 111954902400.

The previous prime is 123633980257. The next prime is 123633980263. The reversal of 123633980261 is 162089336321.

It is not a de Polignac number, because 123633980261 - 2² = 123633980257 is a prime.

It is a super-2 number, since 2×123633980261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123633980263) 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, 7298081 + ... + 7315001.

It is an arithmetic number, because the mean of its divisors is an integer number (8462590668).

Almost surely, 2^123633980261 is an apocalyptic number.

123633980261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123633980261 is a deficient number, since it is larger than the sum of its proper divisors (11767470427).

123633980261 is a wasteful number, since it uses less digits than its factorization.

123633980261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19492.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 123633980261 in words is "one hundred twenty-three billion, six hundred thirty-three million, nine hundred eighty thousand, two hundred sixty-one".