2780115465 has 16 divisors (see below), whose sum is σ = 4504492800. Its totient is φ = 1463958912.

The previous prime is 2780115439. The next prime is 2780115467. The reversal of 2780115465 is 5645110872.

It is not a de Polignac number, because 2780115465 - 2¹³ = 2780107273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2780115467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1171860 + ... + 1174229.

It is an arithmetic number, because the mean of its divisors is an integer number (281530800).

Almost surely, 2^2780115465 is an apocalyptic number.

It is an amenable number.

2780115465 is a deficient number, since it is larger than the sum of its proper divisors (1724377335).

2780115465 is a wasteful number, since it uses less digits than its factorization.

2780115465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2346176.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 2780115465 is about 52726.8002537609. The cubic root of 2780115465 is about 1406.1153346206.

The spelling of 2780115465 in words is "two billion, seven hundred eighty million, one hundred fifteen thousand, four hundred sixty-five".