2561015763 has 6 divisors (see below), whose sum is σ = 3699245004. Its totient is φ = 1707343836.

The previous prime is 2561015761. The next prime is 2561015777. The reversal of 2561015763 is 3675101652.

2561015763 is a `hidden beast` number, since 25 + 61 + 0 + 1 + 576 + 3 = 666.

It is not a de Polignac number, because 2561015763 - 2¹ = 2561015761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2561015761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142278645 + ... + 142278662.

It is an arithmetic number, because the mean of its divisors is an integer number (616540834).

Almost surely, 2^2561015763 is an apocalyptic number.

2561015763 is a deficient number, since it is larger than the sum of its proper divisors (1138229241).

2561015763 is a wasteful number, since it uses less digits than its factorization.

2561015763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284557313 (or 284557310 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 2561015763 is about 50606.4794566862. The cubic root of 2561015763 is about 1368.1616636560.

The spelling of 2561015763 in words is "two billion, five hundred sixty-one million, fifteen thousand, seven hundred sixty-three".