123540311415 has 32 divisors (see below), whose sum is σ = 201623155200. Its totient is φ = 64578501504.

The previous prime is 123540311387. The next prime is 123540311429. The reversal of 123540311415 is 514113045321.

It is not a de Polignac number, because 123540311415 - 2⁶ = 123540311351 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108864 + ... + 508853.

It is an arithmetic number, because the mean of its divisors is an integer number (6300723600).

Almost surely, 2^123540311415 is an apocalyptic number.

123540311415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123540311415 is a deficient number, since it is larger than the sum of its proper divisors (78082843785).

123540311415 is a wasteful number, since it uses less digits than its factorization.

123540311415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617991.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 123540311415 its reverse (514113045321), we get a palindrome (637653356736).

The spelling of 123540311415 in words is "one hundred twenty-three billion, five hundred forty million, three hundred eleven thousand, four hundred fifteen".