9941555197 has 16 divisors (see below), whose sum is σ = 11917140480. Its totient is φ = 8114611968.

The previous prime is 9941555179. The next prime is 9941555233. The reversal of 9941555197 is 7915551499.

It is a cyclic number.

It is not a de Polignac number, because 9941555197 - 2¹⁹ = 9941030909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9941550197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396172 + ... + 420517.

It is an arithmetic number, because the mean of its divisors is an integer number (744821280).

Almost surely, 2^9941555197 is an apocalyptic number.

It is an amenable number.

9941555197 is a deficient number, since it is larger than the sum of its proper divisors (1975585283).

9941555197 is a wasteful number, since it uses less digits than its factorization.

9941555197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816780.

The product of its digits is 2551500, while the sum is 55.

The square root of 9941555197 is about 99707.3477583272. The cubic root of 9941555197 is about 2150.2293028915.

The spelling of 9941555197 in words is "nine billion, nine hundred forty-one million, five hundred fifty-five thousand, one hundred ninety-seven".