3639679428971 has 4 divisors (see below), whose sum is σ = 3831241504200. Its totient is φ = 3448117353744.

The previous prime is 3639679428953. The next prime is 3639679428977. The reversal of 3639679428971 is 1798249769363.

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 3639679428971 - 2²² = 3639675234667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3639679428977) 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, 95781037586 + ... + 95781037623.

It is an arithmetic number, because the mean of its divisors is an integer number (957810376050).

Almost surely, 2^{3639679428971} is an apocalyptic number.

3639679428971 is a deficient number, since it is larger than the sum of its proper divisors (191562075229).

3639679428971 is a wasteful number, since it uses less digits than its factorization.

3639679428971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191562075228.

The product of its digits is 740710656, while the sum is 74.

The spelling of 3639679428971 in words is "three trillion, six hundred thirty-nine billion, six hundred seventy-nine million, four hundred twenty-eight thousand, nine hundred seventy-one".