646505351650453 has 8 divisors (see below), whose sum is σ = 702484592625920. Its totient is φ = 592721375027040.

The previous prime is 646505351650439. The next prime is 646505351650469. The reversal of 646505351650453 is 354056153505646.

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

It is a cyclic number.

It is not a de Polignac number, because 646505351650453 - 2¹⁷ = 646505351519381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646505351657453) 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, 548816087400 + ... + 548816088577.

It is an arithmetic number, because the mean of its divisors is an integer number (87810574078240).

Almost surely, 2^{646505351650453} is an apocalyptic number.

It is an amenable number.

646505351650453 is a deficient number, since it is larger than the sum of its proper divisors (55979240975467).

646505351650453 is a wasteful number, since it uses less digits than its factorization.

646505351650453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097632176027.

The product of its (nonzero) digits is 97200000, while the sum is 58.

The spelling of 646505351650453 in words is "six hundred forty-six trillion, five hundred five billion, three hundred fifty-one million, six hundred fifty thousand, four hundred fifty-three".