77154077069 has 2 divisors, whose sum is σ = 77154077070. Its totient is φ = 77154077068.

The previous prime is 77154076991. The next prime is 77154077083. The reversal of 77154077069 is 96077045177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63244705225 + 13909371844 = 251485^2 + 117938^2 .

It is an emirp because it is prime and its reverse (96077045177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77154077069 - 2²⁰ = 77153028493 is a prime.

It is a super-2 number, since 2×77154077069² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77154077069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77153077069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38577038534 + 38577038535.

It is an arithmetic number, because the mean of its divisors is an integer number (38577038535).

Almost surely, 2^77154077069 is an apocalyptic number.

It is an amenable number.

77154077069 is a deficient number, since it is larger than the sum of its proper divisors (1).

77154077069 is an equidigital number, since it uses as much as digits as its factorization.

77154077069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2593080, while the sum is 53.

The spelling of 77154077069 in words is "seventy-seven billion, one hundred fifty-four million, seventy-seven thousand, sixty-nine".