2539691998 has 16 divisors (see below), whose sum is σ = 3821230224. Its totient is φ = 1265955840.

The previous prime is 2539691989. The next prime is 2539692053. The reversal of 2539691998 is 8991969352.

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 in 7 ways as a sum of consecutive naturals, for example, 1277161 + ... + 1279147.

It is an arithmetic number, because the mean of its divisors is an integer number (238826889).

Almost surely, 2^2539691998 is an apocalyptic number.

2539691998 is a deficient number, since it is larger than the sum of its proper divisors (1281538226).

2539691998 is a wasteful number, since it uses less digits than its factorization.

2539691998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627.

The product of its digits is 9447840, while the sum is 61.

The square root of 2539691998 is about 50395.3569091439. The cubic root of 2539691998 is about 1364.3538378354.

The spelling of 2539691998 in words is "two billion, five hundred thirty-nine million, six hundred ninety-one thousand, nine hundred ninety-eight".