2598378961 has 2 divisors, whose sum is σ = 2598378962. Its totient is φ = 2598378960.

The previous prime is 2598378949. The next prime is 2598378989. The reversal of 2598378961 is 1698738952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2570490000 + 27888961 = 50700^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 2598378961 - 2⁹ = 2598378449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2598378896 and 2598378905.

It is not a weakly prime, because it can be changed into another prime (2598373961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1299189480 + 1299189481.

It is an arithmetic number, because the mean of its divisors is an integer number (1299189481).

Almost surely, 2^2598378961 is an apocalyptic number.

It is an amenable number.

2598378961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2598378961 is an equidigital number, since it uses as much as digits as its factorization.

2598378961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 58.

The square root of 2598378961 is about 50974.2970623431. The cubic root of 2598378961 is about 1374.7830332699.

The spelling of 2598378961 in words is "two billion, five hundred ninety-eight million, three hundred seventy-eight thousand, nine hundred sixty-one".