213661024370 has 16 divisors (see below), whose sum is σ = 397851563160. Its totient is φ = 82517361024.

The previous prime is 213661024361. The next prime is 213661024373. The reversal of 213661024370 is 73420166312.

It can be written as a sum of positive squares in 4 ways, for example, as 182781045841 + 30879978529 = 427529^2 + 175727^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213661024370.

It is not an unprimeable number, because it can be changed into a prime (213661024373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368380787 + ... + 368381366.

Almost surely, 2^213661024370 is an apocalyptic number.

213661024370 is a deficient number, since it is larger than the sum of its proper divisors (184190538790).

213661024370 is a wasteful number, since it uses less digits than its factorization.

213661024370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736762189.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 213661024370 in words is "two hundred thirteen billion, six hundred sixty-one million, twenty-four thousand, three hundred seventy".