161416623604 has 6 divisors (see below), whose sum is σ = 282479091314. Its totient is φ = 80708311800.

The previous prime is 161416623523. The next prime is 161416623607. The reversal of 161416623604 is 406326614161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 120199503204 + 41217120400 = 346698^2 + 203020^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161416623607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20177077947 + ... + 20177077954.

Almost surely, 2^161416623604 is an apocalyptic number.

It is an amenable number.

161416623604 is a deficient number, since it is larger than the sum of its proper divisors (121062467710).

161416623604 is a wasteful number, since it uses less digits than its factorization.

161416623604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40354155905 (or 40354155903 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 161416623604 in words is "one hundred sixty-one billion, four hundred sixteen million, six hundred twenty-three thousand, six hundred four".