6716455639 has 4 divisors (see below), whose sum is σ = 6755279256. Its totient is φ = 6677632024.

The previous prime is 6716455619. The next prime is 6716455703. The reversal of 6716455639 is 9365546176.

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 6716455639 - 2¹³ = 6716447447 is a prime.

It is a super-2 number, since 2×6716455639² = 90221552701309796642, which 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 (6716455609) 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, 19411549 + ... + 19411894.

It is an arithmetic number, because the mean of its divisors is an integer number (1688819814).

Almost surely, 2^6716455639 is an apocalyptic number.

6716455639 is a deficient number, since it is larger than the sum of its proper divisors (38823617).

6716455639 is a wasteful number, since it uses less digits than its factorization.

6716455639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38823616.

The product of its digits is 4082400, while the sum is 52.

The square root of 6716455639 is about 81953.9848878625. The cubic root of 6716455639 is about 1886.7457637298.

The spelling of 6716455639 in words is "six billion, seven hundred sixteen million, four hundred fifty-five thousand, six hundred thirty-nine".