646111055450245 has 48 divisors (see below), whose sum is σ = 975491829656064. Its totient is φ = 402142179225600.

The previous prime is 646111055450177. The next prime is 646111055450297. The reversal of 646111055450245 is 542054550111646.

It is not a de Polignac number, because 646111055450245 - 2¹³ = 646111055442053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116290509 + ... + 121719778.

It is an arithmetic number, because the mean of its divisors is an integer number (20322746451168).

Almost surely, 2^{646111055450245} is an apocalyptic number.

It is an amenable number.

646111055450245 is a deficient number, since it is larger than the sum of its proper divisors (329380774205819).

646111055450245 is a wasteful number, since it uses less digits than its factorization.

646111055450245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238010962 (or 238010951 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 49.

The spelling of 646111055450245 in words is "six hundred forty-six trillion, one hundred eleven billion, fifty-five million, four hundred fifty thousand, two hundred forty-five".