2598415861 has 2 divisors, whose sum is σ = 2598415862. Its totient is φ = 2598415860.

The previous prime is 2598415849. The next prime is 2598415871. The reversal of 2598415861 is 1685148952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1567684836 + 1030731025 = 39594^2 + 32105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2598415861 - 2⁹ = 2598415349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2598415811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1299207930 + 1299207931.

It is an arithmetic number, because the mean of its divisors is an integer number (1299207931).

Almost surely, 2^2598415861 is an apocalyptic number.

It is an amenable number.

2598415861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2598415861 is an equidigital number, since it uses as much as digits as its factorization.

2598415861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 49.

The square root of 2598415861 is about 50974.6590081778. The cubic root of 2598415861 is about 1374.7895410778.

The spelling of 2598415861 in words is "two billion, five hundred ninety-eight million, four hundred fifteen thousand, eight hundred sixty-one".