2015402656 has 48 divisors (see below), whose sum is σ = 4182040800. Its totient is φ = 953434368.

The previous prime is 2015402651. The next prime is 2015402677. The reversal of 2015402656 is 6562045102.

It is not an unprimeable number, because it can be changed into a prime (2015402651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617926 + ... + 621178.

It is an arithmetic number, because the mean of its divisors is an integer number (87125850).

Almost surely, 2^2015402656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2015402656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091020400).

2015402656 is an abundant number, since it is smaller than the sum of its proper divisors (2166638144).

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

2015402656 is a wasteful number, since it uses less digits than its factorization.

2015402656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301 (or 4293 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2015402656 is about 44893.2361943311. The cubic root of 2015402656 is about 1263.1471373811.

Adding to 2015402656 its reverse (6562045102), we get a palindrome (8577447758).

The spelling of 2015402656 in words is "two billion, fifteen million, four hundred two thousand, six hundred fifty-six".