1645630698 has 32 divisors (see below), whose sum is σ = 3477335040. Its totient is φ = 517745520.

The previous prime is 1645630669. The next prime is 1645630739. The reversal of 1645630698 is 8960365461.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4261 + ... + 57527.

It is an arithmetic number, because the mean of its divisors is an integer number (108666720).

Almost surely, 2^1645630698 is an apocalyptic number.

1645630698 is an abundant number, since it is smaller than the sum of its proper divisors (1831704342).

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

1645630698 is a wasteful number, since it uses less digits than its factorization.

1645630698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53562.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 1645630698 is about 40566.3739814147. The cubic root of 1645630698 is about 1180.6217871128.

The spelling of 1645630698 in words is "one billion, six hundred forty-five million, six hundred thirty thousand, six hundred ninety-eight".