645453350446 has 4 divisors (see below), whose sum is σ = 968180025672. Its totient is φ = 322726675222.

The previous prime is 645453350441. The next prime is 645453350467. The reversal of 645453350446 is 644053354546.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×645453350446² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 645453350446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645453350441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161363337610 + ... + 161363337613.

It is an arithmetic number, because the mean of its divisors is an integer number (242045006418).

Almost surely, 2^645453350446 is an apocalyptic number.

645453350446 is a deficient number, since it is larger than the sum of its proper divisors (322726675226).

645453350446 is a wasteful number, since it uses less digits than its factorization.

645453350446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322726675225.

The product of its (nonzero) digits is 10368000, while the sum is 49.

The spelling of 645453350446 in words is "six hundred forty-five billion, four hundred fifty-three million, three hundred fifty thousand, four hundred forty-six".