2119661386 has 8 divisors (see below), whose sum is σ = 3180590820. Its totient is φ = 1059464448.

The previous prime is 2119661381. The next prime is 2119661429. The reversal of 2119661386 is 6831669112.

It can be written as a sum of positive squares in 2 ways, for example, as 1816379161 + 303282225 = 42619^2 + 17415^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2119661381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175831 + ... + 187498.

Almost surely, 2^2119661386 is an apocalyptic number.

2119661386 is a deficient number, since it is larger than the sum of its proper divisors (1060929434).

2119661386 is a wasteful number, since it uses less digits than its factorization.

2119661386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366248.

The product of its digits is 93312, while the sum is 43.

The square root of 2119661386 is about 46039.7804729779. The cubic root of 2119661386 is about 1284.5632587462.

The spelling of 2119661386 in words is "two billion, one hundred nineteen million, six hundred sixty-one thousand, three hundred eighty-six".