27780710742 has 24 divisors (see below), whose sum is σ = 60787499760. Its totient is φ = 9168550800.

The previous prime is 27780710717. The next prime is 27780710761. The reversal of 27780710742 is 24701708772.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7638642 + ... + 7642277.

It is an arithmetic number, because the mean of its divisors is an integer number (2532812490).

Almost surely, 2^27780710742 is an apocalyptic number.

27780710742 is an abundant number, since it is smaller than the sum of its proper divisors (33006789018).

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

27780710742 is a wasteful number, since it uses less digits than its factorization.

27780710742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15281028 (or 15281025 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 45.

The spelling of 27780710742 in words is "twenty-seven billion, seven hundred eighty million, seven hundred ten thousand, seven hundred forty-two".