123545142015 has 32 divisors (see below), whose sum is σ = 209530146816. Its totient is φ = 61946626560.

The previous prime is 123545141959. The next prime is 123545142107. The reversal of 123545142015 is 510241545321.

It is not a de Polignac number, because 123545142015 - 2²³ = 123536753407 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33607 + ... + 498216.

It is an arithmetic number, because the mean of its divisors is an integer number (6547817088).

Almost surely, 2^123545142015 is an apocalyptic number.

123545142015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123545142015 is a deficient number, since it is larger than the sum of its proper divisors (85985004801).

123545142015 is a wasteful number, since it uses less digits than its factorization.

123545142015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532759.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 123545142015 its reverse (510241545321), we get a palindrome (633786687336).

The spelling of 123545142015 in words is "one hundred twenty-three billion, five hundred forty-five million, one hundred forty-two thousand, fifteen".