213568490639 has 16 divisors (see below), whose sum is σ = 248743835712. Its totient is φ = 179561211648.

The previous prime is 213568490623. The next prime is 213568490683. The reversal of 213568490639 is 936094865312.

It is a happy number.

It is not a de Polignac number, because 213568490639 - 2⁴ = 213568490623 is a prime.

It is a super-2 number, since 2×213568490639² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213568496639) 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, 1510187 + ... + 1645539.

It is an arithmetic number, because the mean of its divisors is an integer number (15546489732).

Almost surely, 2^213568490639 is an apocalyptic number.

213568490639 is a deficient number, since it is larger than the sum of its proper divisors (35175345073).

213568490639 is a wasteful number, since it uses less digits than its factorization.

213568490639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139666.

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 213568490639 in words is "two hundred thirteen billion, five hundred sixty-eight million, four hundred ninety thousand, six hundred thirty-nine".