2560493997 has 10 divisors (see below), whose sum is σ = 3824935598. Its totient is φ = 1706995944.

The previous prime is 2560493963. The next prime is 2560494019. The reversal of 2560493997 is 7993940652.

2560493997 is a `hidden beast` number, since 2 + 5 + 60 + 493 + 9 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2048558121 + 511935876 = 45261^2 + 22626^2 .

It is not a de Polignac number, because 2560493997 - 2¹⁰ = 2560492973 is a prime.

It is a super-2 number, since 2×2560493997² = 13112259017346072018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560493917) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15805438 + ... + 15805599.

Almost surely, 2^2560493997 is an apocalyptic number.

2560493997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2560493997 is a deficient number, since it is larger than the sum of its proper divisors (1264441601).

2560493997 is an equidigital number, since it uses as much as digits as its factorization.

2560493997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31611049 (or 31611040 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The square root of 2560493997 is about 50601.3240637041. The cubic root of 2560493997 is about 1368.0687436600.

The spelling of 2560493997 in words is "two billion, five hundred sixty million, four hundred ninety-three thousand, nine hundred ninety-seven".