2155416946 has 8 divisors (see below), whose sum is σ = 3233572524. Its totient is φ = 1077559440.

The previous prime is 2155416937. The next prime is 2155416947. The reversal of 2155416946 is 6496145512.

It can be written as a sum of positive squares in 2 ways, for example, as 1839466321 + 315950625 = 42889^2 + 17775^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2155416946² = 9291644422207933832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2155416947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55465 + ... + 85948.

Almost surely, 2^2155416946 is an apocalyptic number.

2155416946 is a deficient number, since it is larger than the sum of its proper divisors (1078155578).

2155416946 is a wasteful number, since it uses less digits than its factorization.

2155416946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149036.

The product of its digits is 259200, while the sum is 43.

The square root of 2155416946 is about 46426.4681620302. The cubic root of 2155416946 is about 1291.7459175201.

The spelling of 2155416946 in words is "two billion, one hundred fifty-five million, four hundred sixteen thousand, nine hundred forty-six".