2561038783 has 8 divisors (see below), whose sum is σ = 2617952400. Its totient is φ = 2504575488.

The previous prime is 2561038771. The next prime is 2561038841. The reversal of 2561038783 is 3878301652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2561038783 - 2¹⁷ = 2560907711 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561038703) 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, 101068 + ... + 123841.

It is an arithmetic number, because the mean of its divisors is an integer number (327244050).

Almost surely, 2^2561038783 is an apocalyptic number.

2561038783 is a deficient number, since it is larger than the sum of its proper divisors (56913617).

2561038783 is a wasteful number, since it uses less digits than its factorization.

2561038783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225161.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 2561038783 is about 50606.7068974064. The cubic root of 2561038783 is about 1368.1657629392.

The spelling of 2561038783 in words is "two billion, five hundred sixty-one million, thirty-eight thousand, seven hundred eighty-three".