123261045041642 has 4 divisors (see below), whose sum is σ = 184891567562466. Its totient is φ = 61630522520820.

The previous prime is 123261045041611. The next prime is 123261045041663. The reversal of 123261045041642 is 246140540162321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 108845590202281 + 14415454839361 = 10432909^2 + 3796769^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123261045041642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30815261260409 + ... + 30815261260412.

Almost surely, 2^{123261045041642} is an apocalyptic number.

123261045041642 is a deficient number, since it is larger than the sum of its proper divisors (61630522520824).

123261045041642 is an equidigital number, since it uses as much as digits as its factorization.

123261045041642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61630522520823.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 123261045041642 in words is "one hundred twenty-three trillion, two hundred sixty-one billion, forty-five million, forty-one thousand, six hundred forty-two".