2781502091 has 2 divisors, whose sum is σ = 2781502092. Its totient is φ = 2781502090.

The previous prime is 2781502069. The next prime is 2781502117. The reversal of 2781502091 is 1902051872.

2781502091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2781502091 - 2¹⁸ = 2781239947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2781501091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390751045 + 1390751046.

It is an arithmetic number, because the mean of its divisors is an integer number (1390751046).

Almost surely, 2^2781502091 is an apocalyptic number.

2781502091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781502091 is an equidigital number, since it uses as much as digits as its factorization.

2781502091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 2781502091 is about 52739.9477720636. The cubic root of 2781502091 is about 1406.3490697585.

The spelling of 2781502091 in words is "two billion, seven hundred eighty-one million, five hundred two thousand, ninety-one".