2509618798 has 4 divisors (see below), whose sum is σ = 3764428200. Its totient is φ = 1254809398.

The previous prime is 2509618777. The next prime is 2509618807. The reversal of 2509618798 is 8978169052.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2509618798² = 12596373022549929608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 627404698 + ... + 627404701.

It is an arithmetic number, because the mean of its divisors is an integer number (941107050).

Almost surely, 2^2509618798 is an apocalyptic number.

2509618798 is a deficient number, since it is larger than the sum of its proper divisors (1254809402).

2509618798 is a wasteful number, since it uses less digits than its factorization.

2509618798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254809401.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The square root of 2509618798 is about 50096.0956362869. The cubic root of 2509618798 is about 1358.9472096719.

The spelling of 2509618798 in words is "two billion, five hundred nine million, six hundred eighteen thousand, seven hundred ninety-eight".