2519749138 has 8 divisors (see below), whose sum is σ = 3780082800. Its totient is φ = 1259721540.

The previous prime is 2519749097. The next prime is 2519749151. The reversal of 2519749138 is 8319479152.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2519749091 and 2519749100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54688 + ... + 89611.

It is an arithmetic number, because the mean of its divisors is an integer number (472510350).

Almost surely, 2^2519749138 is an apocalyptic number.

2519749138 is a deficient number, since it is larger than the sum of its proper divisors (1260333662).

2519749138 is a wasteful number, since it uses less digits than its factorization.

2519749138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153032.

The product of its digits is 544320, while the sum is 49.

The square root of 2519749138 is about 50197.1028845291. The cubic root of 2519749138 is about 1360.7732659209.

The spelling of 2519749138 in words is "two billion, five hundred nineteen million, seven hundred forty-nine thousand, one hundred thirty-eight".