646616429143 has 4 divisors (see below), whose sum is σ = 649020207960. Its totient is φ = 644212650328.

The previous prime is 646616429111. The next prime is 646616429149. The reversal of 646616429143 is 341924616646.

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

It is a cyclic number.

It is not a de Polignac number, because 646616429143 - 2⁵ = 646616429111 is a prime.

It is a super-2 number, since 2×646616429143² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646616429149) 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, 1201889005 + ... + 1201889542.

It is an arithmetic number, because the mean of its divisors is an integer number (162255051990).

Almost surely, 2^646616429143 is an apocalyptic number.

646616429143 is a deficient number, since it is larger than the sum of its proper divisors (2403778817).

646616429143 is a wasteful number, since it uses less digits than its factorization.

646616429143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403778816.

The product of its digits is 4478976, while the sum is 52.

The spelling of 646616429143 in words is "six hundred forty-six billion, six hundred sixteen million, four hundred twenty-nine thousand, one hundred forty-three".