151515012500 has 72 divisors (see below), whose sum is σ = 331921818144. Its totient is φ = 60513860000.

The previous prime is 151515012449. The next prime is 151515012503. The reversal of 151515012500 is 5210515151.

It is a self number, because there is not a number n which added to its sum of digits gives 151515012500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151515012503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8528627 + ... + 8546373.

It is an arithmetic number, because the mean of its divisors is an integer number (4610025252).

Almost surely, 2^151515012500 is an apocalyptic number.

151515012500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151515012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165960909072).

151515012500 is an abundant number, since it is smaller than the sum of its proper divisors (180406805644).

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

151515012500 is an equidigital number, since it uses as much as digits as its factorization.

151515012500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18459 (or 18437 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 26.

Adding to 151515012500 its reverse (5210515151), we get a palindrome (156725527651).

The spelling of 151515012500 in words is "one hundred fifty-one billion, five hundred fifteen million, twelve thousand, five hundred".