169638390642 has 16 divisors (see below), whose sum is σ = 387744892992. Its totient is φ = 48468111600.

The previous prime is 169638390641. The next prime is 169638390659. The reversal of 169638390642 is 246093836961.

It is not an unprimeable number, because it can be changed into a prime (169638390641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019504609 + ... + 2019504692.

It is an arithmetic number, because the mean of its divisors is an integer number (24234055812).

Almost surely, 2^169638390642 is an apocalyptic number.

169638390642 is an abundant number, since it is smaller than the sum of its proper divisors (218106502350).

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

169638390642 is a wasteful number, since it uses less digits than its factorization.

169638390642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039009313.

The product of its (nonzero) digits is 10077696, while the sum is 57.

The spelling of 169638390642 in words is "one hundred sixty-nine billion, six hundred thirty-eight million, three hundred ninety thousand, six hundred forty-two".