3969649855888 has 10 divisors (see below), whose sum is σ = 7691196595814. Its totient is φ = 1984824927936.

The previous prime is 3969649855879. The next prime is 3969649855903. The reversal of 3969649855888 is 8885589469693.

It can be written as a sum of positive squares in only one way, i.e., 3812225010064 + 157424845824 = 1952492^2 + 396768^2 .

It is a super-3 number, since 3×3969649855888³ (a number of 39 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3969649855799 and 3969649855808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124051557981 + ... + 124051558012.

Almost surely, 2^{3969649855888} is an apocalyptic number.

It is an amenable number.

3969649855888 is a deficient number, since it is larger than the sum of its proper divisors (3721546739926).

3969649855888 is a wasteful number, since it uses less digits than its factorization.

3969649855888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248103116001 (or 248103115995 counting only the distinct ones).

The product of its digits is 32248627200, while the sum is 88.

The spelling of 3969649855888 in words is "three trillion, nine hundred sixty-nine billion, six hundred forty-nine million, eight hundred fifty-five thousand, eight hundred eighty-eight".