27649787907 has 16 divisors (see below), whose sum is σ = 42847130880. Its totient is φ = 15532083552.

The previous prime is 27649787897. The next prime is 27649787917. The reversal of 27649787907 is 70978794672.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27649787897) and next prime (27649787917).

It is not a de Polignac number, because 27649787907 - 2²⁷ = 27515570179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27649787917) 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, 11156868 + ... + 11159345.

It is an arithmetic number, because the mean of its divisors is an integer number (2677945680).

Almost surely, 2^27649787907 is an apocalyptic number.

27649787907 is a deficient number, since it is larger than the sum of its proper divisors (15197342973).

27649787907 is a wasteful number, since it uses less digits than its factorization.

27649787907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22316282.

The product of its (nonzero) digits is 74680704, while the sum is 66.

The spelling of 27649787907 in words is "twenty-seven billion, six hundred forty-nine million, seven hundred eighty-seven thousand, nine hundred seven".