27715157780 has 24 divisors (see below), whose sum is σ = 60732346752. Its totient is φ = 10604060192.

The previous prime is 27715157773. The next prime is 27715157801. The reversal of 27715157780 is 8775151772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30124712 + ... + 30125631.

It is an arithmetic number, because the mean of its divisors is an integer number (2530514448).

Almost surely, 2^27715157780 is an apocalyptic number.

27715157780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27715157780 is an abundant number, since it is smaller than the sum of its proper divisors (33017188972).

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

27715157780 is a wasteful number, since it uses less digits than its factorization.

27715157780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60250375 (or 60250373 counting only the distinct ones).

The product of its (nonzero) digits is 960400, while the sum is 50.

The spelling of 27715157780 in words is "twenty-seven billion, seven hundred fifteen million, one hundred fifty-seven thousand, seven hundred eighty".