77770380114781 has 4 divisors (see below), whose sum is σ = 77770459693564. Its totient is φ = 77770300536000.

The previous prime is 77770380114689. The next prime is 77770380114821. The reversal of 77770380114781 is 18741108307777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25602031424025 + 52168348690756 = 5059845^2 + 7222766^2 .

It is a cyclic number.

It is not a de Polignac number, because 77770380114781 - 2⁷ = 77770380114653 is a prime.

It is a super-2 number, since 2×77770380114781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77770380114281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38305020 + ... + 40284181.

It is an arithmetic number, because the mean of its divisors is an integer number (19442614923391).

Almost surely, 2^{77770380114781} is an apocalyptic number.

It is an amenable number.

77770380114781 is a deficient number, since it is larger than the sum of its proper divisors (79578783).

77770380114781 is an equidigital number, since it uses as much as digits as its factorization.

77770380114781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79578782.

The product of its (nonzero) digits is 12907776, while the sum is 61.

The spelling of 77770380114781 in words is "seventy-seven trillion, seven hundred seventy billion, three hundred eighty million, one hundred fourteen thousand, seven hundred eighty-one".