11987658146 has 24 divisors (see below), whose sum is σ = 18733221012. Its totient is φ = 5751676800.

The previous prime is 11987658127. The next prime is 11987658149. The reversal of 11987658146 is 64185678911.

It can be written as a sum of positive squares in 6 ways, for example, as 1819960921 + 10167697225 = 42661^2 + 100835^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11987658091 and 11987658100.

It is not an unprimeable number, because it can be changed into a prime (11987658149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175856 + ... + 234308.

Almost surely, 2^11987658146 is an apocalyptic number.

11987658146 is a deficient number, since it is larger than the sum of its proper divisors (6745562866).

11987658146 is an equidigital number, since it uses as much as digits as its factorization.

11987658146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58598 (or 58557 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 56.

The spelling of 11987658146 in words is "eleven billion, nine hundred eighty-seven million, six hundred fifty-eight thousand, one hundred forty-six".