9977702156639 has 4 divisors (see below), whose sum is σ = 11403088179024. Its totient is φ = 8552316134256.

The previous prime is 9977702156633. The next prime is 9977702156647. The reversal of 9977702156639 is 9366512077799.

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 9977702156639 - 2⁴ = 9977702156623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977702156633) 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, 712693011182 + ... + 712693011195.

It is an arithmetic number, because the mean of its divisors is an integer number (2850772044756).

Almost surely, 2^{9977702156639} is an apocalyptic number.

9977702156639 is a deficient number, since it is larger than the sum of its proper divisors (1425386022385).

9977702156639 is a wasteful number, since it uses less digits than its factorization.

9977702156639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425386022384.

The product of its (nonzero) digits is 270050760, while the sum is 71.

The spelling of 9977702156639 in words is "nine trillion, nine hundred seventy-seven billion, seven hundred two million, one hundred fifty-six thousand, six hundred thirty-nine".