2542655641 has 2 divisors, whose sum is σ = 2542655642. Its totient is φ = 2542655640.

The previous prime is 2542655597. The next prime is 2542655653. The reversal of 2542655641 is 1465562452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2225103241 + 317552400 = 47171^2 + 17820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542655641 - 2⁷ = 2542655513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2542655594 and 2542655603.

It is not a weakly prime, because it can be changed into another prime (2542655041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271327820 + 1271327821.

It is an arithmetic number, because the mean of its divisors is an integer number (1271327821).

Almost surely, 2^2542655641 is an apocalyptic number.

It is an amenable number.

2542655641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2542655641 is an equidigital number, since it uses as much as digits as its factorization.

2542655641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 40.

The square root of 2542655641 is about 50424.7522651326. The cubic root of 2542655641 is about 1364.8843333853.

The spelling of 2542655641 in words is "two billion, five hundred forty-two million, six hundred fifty-five thousand, six hundred forty-one".