2562550778 has 4 divisors (see below), whose sum is σ = 3843826170. Its totient is φ = 1281275388.

The previous prime is 2562550747. The next prime is 2562550807. The reversal of 2562550778 is 8770552652.

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., 2313321409 + 249229369 = 48097^2 + 15787^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640637693 + ... + 640637696.

Almost surely, 2^2562550778 is an apocalyptic number.

2562550778 is a deficient number, since it is larger than the sum of its proper divisors (1281275392).

2562550778 is a wasteful number, since it uses less digits than its factorization.

2562550778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281275391.

The product of its (nonzero) digits is 1176000, while the sum is 47.

The square root of 2562550778 is about 50621.6433751414. The cubic root of 2562550778 is about 1368.4349574602.

The spelling of 2562550778 in words is "two billion, five hundred sixty-two million, five hundred fifty thousand, seven hundred seventy-eight".