1077778745 has 8 divisors (see below), whose sum is σ = 1304780616. Its totient is φ = 854592256.

The previous prime is 1077778739. The next prime is 1077778753. The reversal of 1077778745 is 5478777701.

It can be written as a sum of positive squares in 4 ways, for example, as 2725801 + 1075052944 = 1651^2 + 32788^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1077778745 - 2¹⁶ = 1077713209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953222 + ... + 954351.

It is an arithmetic number, because the mean of its divisors is an integer number (163097577).

Almost surely, 2^1077778745 is an apocalyptic number.

It is an amenable number.

1077778745 is a deficient number, since it is larger than the sum of its proper divisors (227001871).

1077778745 is a wasteful number, since it uses less digits than its factorization.

1077778745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907691.

The product of its (nonzero) digits is 2689120, while the sum is 53.

The square root of 1077778745 is about 32829.5407369643. The cubic root of 1077778745 is about 1025.2816977086.

The spelling of 1077778745 in words is "one billion, seventy-seven million, seven hundred seventy-eight thousand, seven hundred forty-five".