2117955356986 has 24 divisors (see below), whose sum is σ = 3746240869140. Its totient is φ = 895260969792.

The previous prime is 2117955356911. The next prime is 2117955357079. The reversal of 2117955356986 is 6896535597112.

It can be written as a sum of positive squares in 2 ways, for example, as 2102137515625 + 15817841361 = 1449875^2 + 125769^2 .

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148018801 + ... + 148033108.

Almost surely, 2^{2117955356986} is an apocalyptic number.

2117955356986 is a deficient number, since it is larger than the sum of its proper divisors (1628285512154).

2117955356986 is a wasteful number, since it uses less digits than its factorization.

2117955356986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296051998 (or 296051991 counting only the distinct ones).

The product of its digits is 122472000, while the sum is 67.

The spelling of 2117955356986 in words is "two trillion, one hundred seventeen billion, nine hundred fifty-five million, three hundred fifty-six thousand, nine hundred eighty-six".