2015323555140 has 288 divisors, whose sum is σ = 7399098330624. Its totient is φ = 433450414080.

The previous prime is 2015323555129. The next prime is 2015323555199. The reversal of 2015323555140 is 415553235102.

2015323555140 is a `hidden beast` number, since 2 + 0 + 1 + 5 + 32 + 35 + 551 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2015323555095 and 2015323555104.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 133803210 + ... + 133818270.

It is an arithmetic number, because the mean of its divisors is an integer number (25691313648).

Almost surely, 2^{2015323555140} is an apocalyptic number.

2015323555140 is a gapful number since it is divisible by the number (20) 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 2015323555140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3699549165312).

2015323555140 is an abundant number, since it is smaller than the sum of its proper divisors (5383774775484).

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

2015323555140 is a wasteful number, since it uses less digits than its factorization.

2015323555140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21347 (or 21342 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 2015323555140 in words is "two trillion, fifteen billion, three hundred twenty-three million, five hundred fifty-five thousand, one hundred forty".