27780505276690 has 64 divisors (see below), whose sum is σ = 51523069669632. Its totient is φ = 10780662816000.

The previous prime is 27780505276651. The next prime is 27780505276691. The reversal of 27780505276690 is 9667250508772.

It is a super-2 number, since 2×27780505276690² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27780505276691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15346189 + ... + 17060671.

It is an arithmetic number, because the mean of its divisors is an integer number (805047963588).

Almost surely, 2^{27780505276690} is an apocalyptic number.

27780505276690 is a deficient number, since it is larger than the sum of its proper divisors (23742564392942).

27780505276690 is a wasteful number, since it uses less digits than its factorization.

27780505276690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714915.

The product of its (nonzero) digits is 88905600, while the sum is 64.

The spelling of 27780505276690 in words is "twenty-seven trillion, seven hundred eighty billion, five hundred five million, two hundred seventy-six thousand, six hundred ninety".