2780773137 has 6 divisors (see below), whose sum is σ = 4016672322. Its totient is φ = 1853848752.

The previous prime is 2780773133. The next prime is 2780773157. The reversal of 2780773137 is 7313770872.

It can be written as a sum of positive squares in only one way, i.e., 2065157136 + 715616001 = 45444^2 + 26751^2 .

It is not a de Polignac number, because 2780773137 - 2² = 2780773133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2780773092 and 2780773101.

It is not an unprimeable number, because it can be changed into a prime (2780773133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154487388 + ... + 154487405.

It is an arithmetic number, because the mean of its divisors is an integer number (669445387).

Almost surely, 2^2780773137 is an apocalyptic number.

It is an amenable number.

2780773137 is a deficient number, since it is larger than the sum of its proper divisors (1235899185).

2780773137 is a wasteful number, since it uses less digits than its factorization.

2780773137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308974799 (or 308974796 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The square root of 2780773137 is about 52733.0364856794. The cubic root of 2780773137 is about 1406.2262040892.

The spelling of 2780773137 in words is "two billion, seven hundred eighty million, seven hundred seventy-three thousand, one hundred thirty-seven".