853977671638 has 32 divisors (see below), whose sum is σ = 1581117721344. Its totient is φ = 336863701152.

The previous prime is 853977671629. The next prime is 853977671653. The reversal of 853977671638 is 836176779358.

853977671638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6697920 + ... + 6824227.

It is an arithmetic number, because the mean of its divisors is an integer number (49409928792).

Almost surely, 2^853977671638 is an apocalyptic number.

853977671638 is a deficient number, since it is larger than the sum of its proper divisors (727140049706).

853977671638 is a wasteful number, since it uses less digits than its factorization.

853977671638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13522516.

The product of its digits is 320060160, while the sum is 70.

The spelling of 853977671638 in words is "eight hundred fifty-three billion, nine hundred seventy-seven million, six hundred seventy-one thousand, six hundred thirty-eight".