9980155967 has 4 divisors (see below), whose sum is σ = 10120721616. Its totient is φ = 9839590320.

The previous prime is 9980155963. The next prime is 9980155987. The reversal of 9980155967 is 7695510899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7695510899 = 179 ⋅42991681.

It is a cyclic number.

It is not a de Polignac number, because 9980155967 - 2² = 9980155963 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 (9980155963) 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, 70282718 + ... + 70282859.

It is an arithmetic number, because the mean of its divisors is an integer number (2530180404).

Almost surely, 2^9980155967 is an apocalyptic number.

9980155967 is a deficient number, since it is larger than the sum of its proper divisors (140565649).

9980155967 is a wasteful number, since it uses less digits than its factorization.

9980155967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140565648.

The product of its (nonzero) digits is 6123600, while the sum is 59.

The square root of 9980155967 is about 99900.7305628943. The cubic root of 9980155967 is about 2153.0086572379.

The spelling of 9980155967 in words is "nine billion, nine hundred eighty million, one hundred fifty-five thousand, nine hundred sixty-seven".