2491765547 has 2 divisors, whose sum is σ = 2491765548. Its totient is φ = 2491765546.

The previous prime is 2491765517. The next prime is 2491765571. The reversal of 2491765547 is 7455671942.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2491765547 - 2¹⁴ = 2491749163 is a prime.

It is a super-3 number, since 3×2491765547³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2491765495 and 2491765504.

It is not a weakly prime, because it can be changed into another prime (2491765517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245882773 + 1245882774.

It is an arithmetic number, because the mean of its divisors is an integer number (1245882774).

Almost surely, 2^2491765547 is an apocalyptic number.

2491765547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491765547 is an equidigital number, since it uses as much as digits as its factorization.

2491765547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 50.

The square root of 2491765547 is about 49917.5875518840. The cubic root of 2491765547 is about 1355.7170529724.

The spelling of 2491765547 in words is "two billion, four hundred ninety-one million, seven hundred sixty-five thousand, five hundred forty-seven".