1077778718 has 4 divisors (see below), whose sum is σ = 1616668080. Its totient is φ = 538889358.

The previous prime is 1077778717. The next prime is 1077778721. The reversal of 1077778718 is 8178777701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8178777701 = 8101 ⋅1009601.

It is a self number, because there is not a number n which added to its sum of digits gives 1077778718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1077778717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269444678 + ... + 269444681.

It is an arithmetic number, because the mean of its divisors is an integer number (404167020).

Almost surely, 2^1077778718 is an apocalyptic number.

1077778718 is a deficient number, since it is larger than the sum of its proper divisors (538889362).

1077778718 is an equidigital number, since it uses as much as digits as its factorization.

1077778718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538889361.

The product of its (nonzero) digits is 1075648, while the sum is 53.

The square root of 1077778718 is about 32829.5403257493. The cubic root of 1077778718 is about 1025.2816891470.

The spelling of 1077778718 in words is "one billion, seventy-seven million, seven hundred seventy-eight thousand, seven hundred eighteen".