77274841720553 has 2 divisors, whose sum is σ = 77274841720554. Its totient is φ = 77274841720552.

The previous prime is 77274841720537. The next prime is 77274841720591. The reversal of 77274841720553 is 35502714847277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57873873670144 + 19400968050409 = 7607488^2 + 4404653^2 .

It is a cyclic number.

It is not a de Polignac number, because 77274841720553 - 2⁴ = 77274841720537 is a prime.

It is not a weakly prime, because it can be changed into another prime (77274841720253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38637420860276 + 38637420860277.

It is an arithmetic number, because the mean of its divisors is an integer number (38637420860277).

Almost surely, 2^{77274841720553} is an apocalyptic number.

It is an amenable number.

77274841720553 is a deficient number, since it is larger than the sum of its proper divisors (1).

77274841720553 is an equidigital number, since it uses as much as digits as its factorization.

77274841720553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92198400, while the sum is 62.

The spelling of 77274841720553 in words is "seventy-seven trillion, two hundred seventy-four billion, eight hundred forty-one million, seven hundred twenty thousand, five hundred fifty-three".