2081377517 has 2 divisors, whose sum is σ = 2081377518. Its totient is φ = 2081377516.

The previous prime is 2081377499. The next prime is 2081377537. The reversal of 2081377517 is 7157731802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2071524196 + 9853321 = 45514^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081377517 - 2⁸ = 2081377261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081377537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040688758 + 1040688759.

It is an arithmetic number, because the mean of its divisors is an integer number (1040688759).

Almost surely, 2^2081377517 is an apocalyptic number.

It is an amenable number.

2081377517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081377517 is an equidigital number, since it uses as much as digits as its factorization.

2081377517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 2081377517 is about 45622.1165335411. The cubic root of 2081377517 is about 1276.7825927207.

The spelling of 2081377517 in words is "two billion, eighty-one million, three hundred seventy-seven thousand, five hundred seventeen".