11979519490 has 8 divisors (see below), whose sum is σ = 21563135100. Its totient is φ = 4791807792.

The previous prime is 11979519481. The next prime is 11979519509. The reversal of 11979519490 is 9491597911.

It can be written as a sum of positive squares in 2 ways, for example, as 11262940129 + 716579361 = 106127^2 + 26769^2 .

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

It is a super-2 number, since 2×11979519490² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598975965 + ... + 598975984.

Almost surely, 2^11979519490 is an apocalyptic number.

11979519490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11979519490 is a deficient number, since it is larger than the sum of its proper divisors (9583615610).

11979519490 is a wasteful number, since it uses less digits than its factorization.

11979519490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197951956.

The product of its (nonzero) digits is 918540, while the sum is 55.

The spelling of 11979519490 in words is "eleven billion, nine hundred seventy-nine million, five hundred nineteen thousand, four hundred ninety".