2069472778 has 4 divisors (see below), whose sum is σ = 3104209170. Its totient is φ = 1034736388.

The previous prime is 2069472773. The next prime is 2069472793. The reversal of 2069472778 is 8772749602.

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

It can be written as a sum of positive squares in only one way, i.e., 1783964169 + 285508609 = 42237^2 + 16897^2 .

It is not an unprimeable number, because it can be changed into a prime (2069472773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 517368193 + ... + 517368196.

Almost surely, 2^2069472778 is an apocalyptic number.

2069472778 is a deficient number, since it is larger than the sum of its proper divisors (1034736392).

2069472778 is a wasteful number, since it uses less digits than its factorization.

2069472778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034736391.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The square root of 2069472778 is about 45491.4582971353. The cubic root of 2069472778 is about 1274.3436894915.

The spelling of 2069472778 in words is "two billion, sixty-nine million, four hundred seventy-two thousand, seven hundred seventy-eight".