76426561 has 2 divisors, whose sum is σ = 76426562. Its totient is φ = 76426560.

The previous prime is 76426517. The next prime is 76426589. The reversal of 76426561 is 16562467.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40246336 + 36180225 = 6344^2 + 6015^2 .

It is a cyclic number.

It is not a de Polignac number, because 76426561 - 2¹³ = 76418369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76426561.

It is not a weakly prime, because it can be changed into another prime (76426261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38213280 + 38213281.

It is an arithmetic number, because the mean of its divisors is an integer number (38213281).

Almost surely, 2^76426561 is an apocalyptic number.

It is an amenable number.

76426561 is a deficient number, since it is larger than the sum of its proper divisors (1).

76426561 is an equidigital number, since it uses as much as digits as its factorization.

76426561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 76426561 is about 8742.2286060249. The cubic root of 76426561 is about 424.3733528408.

The spelling of 76426561 in words is "seventy-six million, four hundred twenty-six thousand, five hundred sixty-one".