123015928815 has 24 divisors (see below), whose sum is σ = 229629734880. Its totient is φ = 60561687744.

The previous prime is 123015928771. The next prime is 123015928843. The reversal of 123015928815 is 518829510321.

123015928815 is a `hidden beast` number, since 1 + 2 + 301 + 59 + 288 + 15 = 666.

It is not a de Polignac number, because 123015928815 - 2¹¹ = 123015926767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105141235 + ... + 105142404.

It is an arithmetic number, because the mean of its divisors is an integer number (9567905620).

Almost surely, 2^123015928815 is an apocalyptic number.

123015928815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123015928815 is a deficient number, since it is larger than the sum of its proper divisors (106613806065).

123015928815 is a wasteful number, since it uses less digits than its factorization.

123015928815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210283663 (or 210283660 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 123015928815 in words is "one hundred twenty-three billion, fifteen million, nine hundred twenty-eight thousand, eight hundred fifteen".