645062194 has 8 divisors (see below), whose sum is σ = 1105820928. Its totient is φ = 276455220.

The previous prime is 645062191. The next prime is 645062203. The reversal of 645062194 is 491260546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×645062194² = 832210468256187272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645062191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23037922 + ... + 23037949.

It is an arithmetic number, because the mean of its divisors is an integer number (138227616).

Almost surely, 2^645062194 is an apocalyptic number.

645062194 is a deficient number, since it is larger than the sum of its proper divisors (460758734).

645062194 is a wasteful number, since it uses less digits than its factorization.

645062194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46075880.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 645062194 is about 25398.0746120646. The cubic root of 645062194 is about 864.0400296169.

It can be divided in two parts, 6450 and 62194, that added together give a square (68644 = 262²).

The spelling of 645062194 in words is "six hundred forty-five million, sixty-two thousand, one hundred ninety-four".