27291769640 has 32 divisors (see below), whose sum is σ = 64076330880. Its totient is φ = 10442068032.

The previous prime is 27291769607. The next prime is 27291769643. The reversal of 27291769640 is 4696719272.

It is not an unprimeable number, because it can be changed into a prime (27291769643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14831564 + ... + 14833403.

It is an arithmetic number, because the mean of its divisors is an integer number (2002385340).

Almost surely, 2^27291769640 is an apocalyptic number.

27291769640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27291769640 is an abundant number, since it is smaller than the sum of its proper divisors (36784561240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27291769640 is a wasteful number, since it uses less digits than its factorization.

27291769640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29665001 (or 29664997 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 27291769640 in words is "twenty-seven billion, two hundred ninety-one million, seven hundred sixty-nine thousand, six hundred forty".