2780653491 has 24 divisors (see below), whose sum is σ = 5007585024. Its totient is φ = 1444494960.

The previous prime is 2780653457. The next prime is 2780653493. The reversal of 2780653491 is 1943560872.

2780653491 is a `hidden beast` number, since 27 + 8 + 0 + 6 + 534 + 91 = 666.

2780653491 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2780653491 - 2¹⁴ = 2780637107 is a prime.

2780653491 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (2780653493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2005551 + ... + 2006936.

It is an arithmetic number, because the mean of its divisors is an integer number (208649376).

It is a 1-persistent number, because it is pandigital, but 2⋅2780653491 = 5561306982 is not.

Almost surely, 2^2780653491 is an apocalyptic number.

2780653491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2780653491 is a deficient number, since it is larger than the sum of its proper divisors (2226931533).

2780653491 is a wasteful number, since it uses less digits than its factorization.

2780653491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012511 (or 4012508 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2780653491 is about 52731.9020233483. The cubic root of 2780653491 is about 1406.2060356270.

The spelling of 2780653491 in words is "two billion, seven hundred eighty million, six hundred fifty-three thousand, four hundred ninety-one".