206425163634 has 32 divisors (see below), whose sum is σ = 413635222080. Its totient is φ = 68677637952.

The previous prime is 206425163617. The next prime is 206425163653. The reversal of 206425163634 is 436361524602.

It is a happy number.

It is a super-2 number, since 2×206425163634² (a number of 23 digits) contains 22 as substring.

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, 19444912 + ... + 19455524.

It is an arithmetic number, because the mean of its divisors is an integer number (12926100690).

Almost surely, 2^206425163634 is an apocalyptic number.

206425163634 is an abundant number, since it is smaller than the sum of its proper divisors (207210058446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206425163634 is a wasteful number, since it uses less digits than its factorization.

206425163634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16474.

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 206425163634 in words is "two hundred six billion, four hundred twenty-five million, one hundred sixty-three thousand, six hundred thirty-four".