27128268870 has 32 divisors (see below), whose sum is σ = 66493122048. Its totient is φ = 7080285408.

The previous prime is 27128268851. The next prime is 27128268889. The reversal of 27128268870 is 7886282172.

It is an interprime number because it is at equal distance from previous prime (27128268851) and next prime (27128268889).

It is a super-2 number, since 2×27128268870² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9618544 + ... + 9621363.

It is an arithmetic number, because the mean of its divisors is an integer number (2077910064).

Almost surely, 2^27128268870 is an apocalyptic number.

27128268870 is an abundant number, since it is smaller than the sum of its proper divisors (39364853178).

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

27128268870 is a wasteful number, since it uses less digits than its factorization.

27128268870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19239964.

The product of its (nonzero) digits is 1204224, while the sum is 51.

The spelling of 27128268870 in words is "twenty-seven billion, one hundred twenty-eight million, two hundred sixty-eight thousand, eight hundred seventy".