2015511000061 has 16 divisors (see below), whose sum is σ = 2284928645440. Its totient is φ = 1762445018880.

The previous prime is 2015511000059. The next prime is 2015511000131. The reversal of 2015511000061 is 1600001155102.

It is a happy number.

It is not a de Polignac number, because 2015511000061 - 2¹ = 2015511000059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2015510999996 and 2015511000041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015511000011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3969706 + ... + 4448548.

It is an arithmetic number, because the mean of its divisors is an integer number (142808040340).

Almost surely, 2^{2015511000061} is an apocalyptic number.

It is an amenable number.

2015511000061 is a deficient number, since it is larger than the sum of its proper divisors (269417645379).

2015511000061 is a wasteful number, since it uses less digits than its factorization.

2015511000061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495916.

The product of its (nonzero) digits is 300, while the sum is 22.

Adding to 2015511000061 its reverse (1600001155102), we get a palindrome (3615512155163).

The spelling of 2015511000061 in words is "two trillion, fifteen billion, five hundred eleven million, sixty-one", and thus it is an aban number.