2561362040 has 32 divisors (see below), whose sum is σ = 5767146000. Its totient is φ = 1023819264.

The previous prime is 2561362039. The next prime is 2561362043. The reversal of 2561362040 is 402631652.

It is a junction number, because it is equal to n+sod(n) for n = 2561361994 and 2561362012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561362043) 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, 36416 + ... + 80304.

Almost surely, 2^2561362040 is an apocalyptic number.

2561362040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2561362040 is an abundant number, since it is smaller than the sum of its proper divisors (3205783960).

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

2561362040 is a wasteful number, since it uses less digits than its factorization.

2561362040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45359 (or 45355 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2561362040 is about 50609.9006124296. The cubic root of 2561362040 is about 1368.2233242898.

Adding to 2561362040 its reverse (402631652), we get a palindrome (2963993692).

The spelling of 2561362040 in words is "two billion, five hundred sixty-one million, three hundred sixty-two thousand, forty".