2545597987 has 2 divisors, whose sum is σ = 2545597988. Its totient is φ = 2545597986.

The previous prime is 2545597981. The next prime is 2545597997. The reversal of 2545597987 is 7897955452.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2545597987 is a prime.

It is a super-2 number, since 2×2545597987² = 12960138222836904338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2545597981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272798993 + 1272798994.

It is an arithmetic number, because the mean of its divisors is an integer number (1272798994).

Almost surely, 2^2545597987 is an apocalyptic number.

2545597987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545597987 is an equidigital number, since it uses as much as digits as its factorization.

2545597987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752000, while the sum is 61.

The square root of 2545597987 is about 50453.9194414071. The cubic root of 2545597987 is about 1365.4106091167.

The spelling of 2545597987 in words is "two billion, five hundred forty-five million, five hundred ninety-seven thousand, nine hundred eighty-seven".