9970202655 has 64 divisors (see below), whose sum is σ = 20296657920. Its totient is φ = 4548866688.

The previous prime is 9970202651. The next prime is 9970202659. The reversal of 9970202655 is 5562020799.

9970202655 is a nontrivial binomial coefficient, being equal to C(141211, 2).

It is an interprime number because it is at equal distance from previous prime (9970202651) and next prime (9970202659).

It is not a de Polignac number, because 9970202655 - 2² = 9970202651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 9970202655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9970202651) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 484149 + ... + 504321.

It is an arithmetic number, because the mean of its divisors is an integer number (317135280).

Almost surely, 2^9970202655 is an apocalyptic number.

9970202655 is the 141210-th triangular number.

9970202655 is an abundant number, since it is smaller than the sum of its proper divisors (10326455265).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9970202655 is a wasteful number, since it uses less digits than its factorization.

9970202655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20717 (or 20711 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 9970202655 is about 99850.9021241170. The cubic root of 9970202655 is about 2152.2926799559.

The spelling of 9970202655 in words is "nine billion, nine hundred seventy million, two hundred two thousand, six hundred fifty-five".