162561735638 has 16 divisors (see below), whose sum is σ = 245007774000. Its totient is φ = 80892744096.

The previous prime is 162561735607. The next prime is 162561735641. The reversal of 162561735638 is 836537165261.

It is a self number, because there is not a number n which added to its sum of digits gives 162561735638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182920 + ... + 1313172.

It is an arithmetic number, because the mean of its divisors is an integer number (15312985875).

Almost surely, 2^162561735638 is an apocalyptic number.

162561735638 is a deficient number, since it is larger than the sum of its proper divisors (82446038362).

162561735638 is a wasteful number, since it uses less digits than its factorization.

162561735638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133231.

The product of its digits is 5443200, while the sum is 53.

The spelling of 162561735638 in words is "one hundred sixty-two billion, five hundred sixty-one million, seven hundred thirty-five thousand, six hundred thirty-eight".