161228629694 has 12 divisors (see below), whose sum is σ = 265827369192. Its totient is φ = 73285740660.

The previous prime is 161228629691. The next prime is 161228629733. The reversal of 161228629694 is 496926822161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161228629691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333116762 + ... + 333117245.

It is an arithmetic number, because the mean of its divisors is an integer number (22152280766).

Almost surely, 2^161228629694 is an apocalyptic number.

161228629694 is a deficient number, since it is larger than the sum of its proper divisors (104598739498).

161228629694 is a wasteful number, since it uses less digits than its factorization.

161228629694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666234031 (or 666234020 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 56.

The spelling of 161228629694 in words is "one hundred sixty-one billion, two hundred twenty-eight million, six hundred twenty-nine thousand, six hundred ninety-four".