11989451498 has 16 divisors (see below), whose sum is σ = 18955351080. Its totient is φ = 5678801856.

The previous prime is 11989451429. The next prime is 11989451519. The reversal of 11989451498 is 89415498911.

It can be written as a sum of positive squares in 4 ways, for example, as 11988717049 + 734449 = 109493^2 + 857^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1947065 + ... + 1953212.

Almost surely, 2^11989451498 is an apocalyptic number.

11989451498 is a deficient number, since it is larger than the sum of its proper divisors (6965899582).

11989451498 is a wasteful number, since it uses less digits than its factorization.

11989451498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900361.

The product of its digits is 3732480, while the sum is 59.

The spelling of 11989451498 in words is "eleven billion, nine hundred eighty-nine million, four hundred fifty-one thousand, four hundred ninety-eight".