1639149085832 has 8 divisors (see below), whose sum is σ = 3073404535950. Its totient is φ = 819574542912.

The previous prime is 1639149085831. The next prime is 1639149085897. The reversal of 1639149085832 is 2385809419361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1165549115236 + 473599970596 = 1079606^2 + 688186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1639149085831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102446817857 + ... + 102446817872.

Almost surely, 2^{1639149085832} is an apocalyptic number.

It is an amenable number.

1639149085832 is a deficient number, since it is larger than the sum of its proper divisors (1434255450118).

1639149085832 is a wasteful number, since it uses less digits than its factorization.

1639149085832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204893635735 (or 204893635731 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 1639149085832 in words is "one trillion, six hundred thirty-nine billion, one hundred forty-nine million, eighty-five thousand, eight hundred thirty-two".