3671216639 has 2 divisors, whose sum is σ = 3671216640. Its totient is φ = 3671216638.

The previous prime is 3671216617. The next prime is 3671216687. The reversal of 3671216639 is 9366121763.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3671216639 is a prime.

It is a super-2 number, since 2×3671216639² = 26955663220940912642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3671216639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3671216699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1835608319 + 1835608320.

It is an arithmetic number, because the mean of its divisors is an integer number (1835608320).

Almost surely, 2^3671216639 is an apocalyptic number.

3671216639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3671216639 is an equidigital number, since it uses as much as digits as its factorization.

3671216639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 3671216639 is about 60590.5655939933. The cubic root of 3671216639 is about 1542.6592384380.

The spelling of 3671216639 in words is "three billion, six hundred seventy-one million, two hundred sixteen thousand, six hundred thirty-nine".