1968586538 has 8 divisors (see below), whose sum is σ = 2962499232. Its totient is φ = 981086796.

The previous prime is 1968586489. The next prime is 1968586559. The reversal of 1968586538 is 8356858691.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1602470 + ... + 1603697.

It is an arithmetic number, because the mean of its divisors is an integer number (370312404).

Almost surely, 2^1968586538 is an apocalyptic number.

1968586538 is a deficient number, since it is larger than the sum of its proper divisors (993912694).

1968586538 is a wasteful number, since it uses less digits than its factorization.

1968586538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206476.

The product of its digits is 12441600, while the sum is 59.

The square root of 1968586538 is about 44368.7563269470. The cubic root of 1968586538 is about 1253.2897956401.

The spelling of 1968586538 in words is "one billion, nine hundred sixty-eight million, five hundred eighty-six thousand, five hundred thirty-eight".