213655387870 has 32 divisors (see below), whose sum is σ = 401374351872. Its totient is φ = 81731376672.

The previous prime is 213655387867. The next prime is 213655387871. The reversal of 213655387870 is 78783556312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213655387871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1210689 + ... + 1375891.

It is an arithmetic number, because the mean of its divisors is an integer number (12542948496).

Almost surely, 2^213655387870 is an apocalyptic number.

213655387870 is a deficient number, since it is larger than the sum of its proper divisors (187718964002).

213655387870 is a wasteful number, since it uses less digits than its factorization.

213655387870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170856.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 213655387870 in words is "two hundred thirteen billion, six hundred fifty-five million, three hundred eighty-seven thousand, eight hundred seventy".