77954407441 has 2 divisors, whose sum is σ = 77954407442. Its totient is φ = 77954407440.

The previous prime is 77954407439. The next prime is 77954407463. The reversal of 77954407441 is 14470445977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77894577216 + 59830225 = 279096^2 + 7735^2 .

It is a cyclic number.

It is not a de Polignac number, because 77954407441 - 2¹ = 77954407439 is a prime.

Together with 77954407439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (77954404441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38977203720 + 38977203721.

It is an arithmetic number, because the mean of its divisors is an integer number (38977203721).

Almost surely, 2^77954407441 is an apocalyptic number.

It is an amenable number.

77954407441 is a deficient number, since it is larger than the sum of its proper divisors (1).

77954407441 is an equidigital number, since it uses as much as digits as its factorization.

77954407441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 52.

The spelling of 77954407441 in words is "seventy-seven billion, nine hundred fifty-four million, four hundred seven thousand, four hundred forty-one".