639454545367 has 4 divisors (see below), whose sum is σ = 697586776776. Its totient is φ = 581322313960.

The previous prime is 639454545361. The next prime is 639454545413. The reversal of 639454545367 is 763545454936.

639454545367 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 639454545367 - 2¹¹ = 639454543319 is a prime.

It is a super-2 number, since 2×639454545367² (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 (639454545361) 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, 29066115688 + ... + 29066115709.

It is an arithmetic number, because the mean of its divisors is an integer number (174396694194).

Almost surely, 2^639454545367 is an apocalyptic number.

639454545367 is a deficient number, since it is larger than the sum of its proper divisors (58132231409).

639454545367 is a wasteful number, since it uses less digits than its factorization.

639454545367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58132231408.

The product of its digits is 163296000, while the sum is 61.

The spelling of 639454545367 in words is "six hundred thirty-nine billion, four hundred fifty-four million, five hundred forty-five thousand, three hundred sixty-seven".