12515151630 has 64 divisors (see below), whose sum is σ = 31905223488. Its totient is φ = 3130982400.

The previous prime is 12515151619. The next prime is 12515151631. The reversal of 12515151630 is 3615151521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515151631) 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 31 ways as a sum of consecutive naturals, for example, 120430 + ... + 198830.

It is an arithmetic number, because the mean of its divisors is an integer number (498519117).

Almost surely, 2^12515151630 is an apocalyptic number.

12515151630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12515151630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15952611744).

12515151630 is an abundant number, since it is smaller than the sum of its proper divisors (19390071858).

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

12515151630 is a wasteful number, since it uses less digits than its factorization.

12515151630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78741.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 12515151630 in words is "twelve billion, five hundred fifteen million, one hundred fifty-one thousand, six hundred thirty".