2015641211420 has 24 divisors (see below), whose sum is σ = 4241162570400. Its totient is φ = 804672479552.

The previous prime is 2015641211413. The next prime is 2015641211443. The reversal of 2015641211420 is 241121465102.

It is a happy number.

It is a congruent number.

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, 98989880 + ... + 99010239.

It is an arithmetic number, because the mean of its divisors is an integer number (176715107100).

Almost surely, 2^{2015641211420} is an apocalyptic number.

2015641211420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015641211420 is an abundant number, since it is smaller than the sum of its proper divisors (2225521358980).

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

2015641211420 is a wasteful number, since it uses less digits than its factorization.

2015641211420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198000637 (or 198000635 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 2015641211420 its reverse (241121465102), we get a palindrome (2256762676522).

The spelling of 2015641211420 in words is "two trillion, fifteen billion, six hundred forty-one million, two hundred eleven thousand, four hundred twenty".