2015251044040 has 32 divisors (see below), whose sum is σ = 4883108300280. Its totient is φ = 744092692992.

The previous prime is 2015251044017. The next prime is 2015251044047. The reversal of 2015251044040 is 404401525102.

It can be written as a sum of positive squares in 4 ways, for example, as 1384119308196 + 631131735844 = 1176486^2 + 794438^2 .

It is a super-2 number, since 2×2015251044040² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2015251044047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1937740869 + ... + 1937741908.

Almost surely, 2^{2015251044040} is an apocalyptic number.

2015251044040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015251044040 is an abundant number, since it is smaller than the sum of its proper divisors (2867857256240).

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

2015251044040 is a wasteful number, since it uses less digits than its factorization.

2015251044040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875482801 (or 3875482797 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 2015251044040 its reverse (404401525102), we get a palindrome (2419652569142).

The spelling of 2015251044040 in words is "two trillion, fifteen billion, two hundred fifty-one million, forty-four thousand, forty".