213628664375786 has 12 divisors (see below), whose sum is σ = 352222467297666. Its totient is φ = 97103938352520.

The previous prime is 213628664375767. The next prime is 213628664375953. The reversal of 213628664375786 is 687573466826312.

213628664375786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 212760701969761 + 867962406025 = 14586319^2 + 931645^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 441381537725 + ... + 441381538208.

Almost surely, 2^{213628664375786} is an apocalyptic number.

213628664375786 is a deficient number, since it is larger than the sum of its proper divisors (138593802921880).

213628664375786 is a wasteful number, since it uses less digits than its factorization.

213628664375786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882763075957 (or 882763075946 counting only the distinct ones).

The product of its digits is 2926264320, while the sum is 74.

The spelling of 213628664375786 in words is "two hundred thirteen trillion, six hundred twenty-eight billion, six hundred sixty-four million, three hundred seventy-five thousand, seven hundred eighty-six".