10515715500078 has 24 divisors (see below), whose sum is σ = 22996985303448. Its totient is φ = 3472479261072.

The previous prime is 10515715500049. The next prime is 10515715500079. The reversal of 10515715500078 is 87000551751501.

10515715500078 is a `hidden beast` number, since 1 + 0 + 5 + 1 + 5 + 71 + 5 + 500 + 0 + 78 = 666.

It is a super-2 number, since 2×10515715500078² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10515715500079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2729934601 + ... + 2729938452.

It is an arithmetic number, because the mean of its divisors is an integer number (958207720977).

Almost surely, 2^{10515715500078} is an apocalyptic number.

10515715500078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10515715500078 is an abundant number, since it is smaller than the sum of its proper divisors (12481269803370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10515715500078 is a wasteful number, since it uses less digits than its factorization.

10515715500078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459873168 (or 5459873165 counting only the distinct ones).

The product of its (nonzero) digits is 245000, while the sum is 45.

The spelling of 10515715500078 in words is "ten trillion, five hundred fifteen billion, seven hundred fifteen million, five hundred thousand, seventy-eight".