2590156861 has 2 divisors, whose sum is σ = 2590156862. Its totient is φ = 2590156860.

The previous prime is 2590156853. The next prime is 2590156909. The reversal of 2590156861 is 1686510952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1910564100 + 679592761 = 43710^2 + 26069^2 .

It is a cyclic number.

It is not a de Polignac number, because 2590156861 - 2³ = 2590156853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2590156801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1295078430 + 1295078431.

It is an arithmetic number, because the mean of its divisors is an integer number (1295078431).

Almost surely, 2^2590156861 is an apocalyptic number.

It is an amenable number.

2590156861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2590156861 is an equidigital number, since it uses as much as digits as its factorization.

2590156861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 2590156861 is about 50893.5836918565. The cubic root of 2590156861 is about 1373.3314170266.

The spelling of 2590156861 in words is "two billion, five hundred ninety million, one hundred fifty-six thousand, eight hundred sixty-one".