15010122078 has 72 divisors (see below), whose sum is σ = 38178957960. Its totient is φ = 4249234080.

The previous prime is 15010122047. The next prime is 15010122079. The reversal of 15010122078 is 87022101051.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15010122079) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18073 + ... + 174203.

It is an arithmetic number, because the mean of its divisors is an integer number (530263305).

Almost surely, 2^15010122078 is an apocalyptic number.

15010122078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15010122078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19089478980).

15010122078 is an abundant number, since it is smaller than the sum of its proper divisors (23168835882).

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

15010122078 is a wasteful number, since it uses less digits than its factorization.

15010122078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156262 (or 156252 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The spelling of 15010122078 in words is "fifteen billion, ten million, one hundred twenty-two thousand, seventy-eight".