2691420481 has 2 divisors, whose sum is σ = 2691420482. Its totient is φ = 2691420480.

The previous prime is 2691420419. The next prime is 2691420533. The reversal of 2691420481 is 1840241962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2138230081 + 553190400 = 46241^2 + 23520^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691420481 - 2²⁵ = 2657866049 is a prime.

It is a super-2 number, since 2×2691420481² = 14487488411092542722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2691420481.

It is not a weakly prime, because it can be changed into another prime (2691420581) 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 as a sum of consecutive naturals, namely, 1345710240 + 1345710241.

It is an arithmetic number, because the mean of its divisors is an integer number (1345710241).

Almost surely, 2^2691420481 is an apocalyptic number.

It is an amenable number.

2691420481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691420481 is an equidigital number, since it uses as much as digits as its factorization.

2691420481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2691420481 is about 51878.9020797472. The cubic root of 2691420481 is about 1391.0001739986. Note that the first 3 decimals are identical.

The spelling of 2691420481 in words is "two billion, six hundred ninety-one million, four hundred twenty thousand, four hundred eighty-one".