1617729946 has 16 divisors (see below), whose sum is σ = 2777224320. Its totient is φ = 692319600.

The previous prime is 1617729929. The next prime is 1617729983. The reversal of 1617729946 is 6499277161.

It is a junction number, because it is equal to n+sod(n) for n = 1617729893 and 1617729902.

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, 72606 + ... + 92233.

It is an arithmetic number, because the mean of its divisors is an integer number (173576520).

Almost surely, 2^1617729946 is an apocalyptic number.

1617729946 is a deficient number, since it is larger than the sum of its proper divisors (1159494374).

1617729946 is a wasteful number, since it uses less digits than its factorization.

1617729946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165549.

The product of its digits is 1143072, while the sum is 52.

The square root of 1617729946 is about 40221.0137366029. The cubic root of 1617729946 is about 1173.9114580798.

The spelling of 1617729946 in words is "one billion, six hundred seventeen million, seven hundred twenty-nine thousand, nine hundred forty-six".