2116915497 has 24 divisors (see below), whose sum is σ = 3239440776. Its totient is φ = 1327520256.

The previous prime is 2116915483. The next prime is 2116915501. The reversal of 2116915497 is 7945196112.

2116915497 is a `hidden beast` number, since 2 + 1 + 16 + 91 + 549 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 32901696 + 2084013801 = 5736^2 + 45651^2 .

It is not a de Polignac number, because 2116915497 - 2⁶ = 2116915433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2116915417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431623 + ... + 436499.

It is an arithmetic number, because the mean of its divisors is an integer number (134976699).

Almost surely, 2^2116915497 is an apocalyptic number.

It is an amenable number.

2116915497 is a deficient number, since it is larger than the sum of its proper divisors (1122525279).

2116915497 is a wasteful number, since it uses less digits than its factorization.

2116915497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737 (or 7734 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 2116915497 is about 46009.9499782384. The cubic root of 2116915497 is about 1284.0083285482.

The spelling of 2116915497 in words is "two billion, one hundred sixteen million, nine hundred fifteen thousand, four hundred ninety-seven".