1645617106 has 16 divisors (see below), whose sum is σ = 2897303616. Its totient is φ = 686203056.

The previous prime is 1645617097. The next prime is 1645617107. The reversal of 1645617106 is 6017165461.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (1645617107) 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, 1587916 + ... + 1588951.

It is an arithmetic number, because the mean of its divisors is an integer number (181081476).

Almost surely, 2^1645617106 is an apocalyptic number.

1645617106 is a deficient number, since it is larger than the sum of its proper divisors (1251686510).

1645617106 is a wasteful number, since it uses less digits than its factorization.

1645617106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176913.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1645617106 is about 40566.2064531551. The cubic root of 1645617106 is about 1180.6185366760.

The spelling of 1645617106 in words is "one billion, six hundred forty-five million, six hundred seventeen thousand, one hundred six".