15145245521320 has 32 divisors (see below), whose sum is σ = 34157744984520. Its totient is φ = 6043708419840.

The previous prime is 15145245521303. The next prime is 15145245521359. The reversal of 15145245521320 is 2312554254151.

It can be written as a sum of positive squares in 4 ways, for example, as 10126740520516 + 5018505000804 = 3182254^2 + 2240202^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449663847 + ... + 449697526.

Almost surely, 2^{15145245521320} is an apocalyptic number.

15145245521320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15145245521320 is an abundant number, since it is smaller than the sum of its proper divisors (19012499463200).

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

15145245521320 is a wasteful number, since it uses less digits than its factorization.

15145245521320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899361805 (or 899361801 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 40.

Adding to 15145245521320 its reverse (2312554254151), we get a palindrome (17457799775471).

The spelling of 15145245521320 in words is "fifteen trillion, one hundred forty-five billion, two hundred forty-five million, five hundred twenty-one thousand, three hundred twenty".