39677816069 has 2 divisors, whose sum is σ = 39677816070. Its totient is φ = 39677816068.

The previous prime is 39677816053. The next prime is 39677816099. The reversal of 39677816069 is 96061877693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31678660225 + 7999155844 = 177985^2 + 89438^2 .

It is a cyclic number.

It is not a de Polignac number, because 39677816069 - 2⁴ = 39677816053 is a prime.

It is a super-2 number, since 2×39677816069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39677816039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19838908034 + 19838908035.

It is an arithmetic number, because the mean of its divisors is an integer number (19838908035).

Almost surely, 2^39677816069 is an apocalyptic number.

It is an amenable number.

39677816069 is a deficient number, since it is larger than the sum of its proper divisors (1).

39677816069 is an equidigital number, since it uses as much as digits as its factorization.

39677816069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 39677816069 in words is "thirty-nine billion, six hundred seventy-seven million, eight hundred sixteen thousand, sixty-nine".