2945551778 has 8 divisors (see below), whose sum is σ = 4758199068. Its totient is φ = 1359485424.

The previous prime is 2945551757. The next prime is 2945551783. The reversal of 2945551778 is 8771555492.

2945551778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2936230969 + 9320809 = 54187^2 + 3053^2 .

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

It is a super-2 number, since 2×2945551778² = 17352550553757922568, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56645201 + ... + 56645252.

Almost surely, 2^2945551778 is an apocalyptic number.

2945551778 is a deficient number, since it is larger than the sum of its proper divisors (1812647290).

2945551778 is a wasteful number, since it uses less digits than its factorization.

2945551778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113290468.

The product of its digits is 3528000, while the sum is 53.

The square root of 2945551778 is about 54272.9378051345. The cubic root of 2945551778 is about 1433.4709200658.

The spelling of 2945551778 in words is "two billion, nine hundred forty-five million, five hundred fifty-one thousand, seven hundred seventy-eight".