27731341680 has 80 divisors (see below), whose sum is σ = 98248187904. Its totient is φ = 6338592000.

The previous prime is 27731341657. The next prime is 27731341691. The reversal of 27731341680 is 8614313772.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×27731341680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 8251696 + ... + 8255055.

Almost surely, 2^27731341680 is an apocalyptic number.

27731341680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27731341680 is an abundant number, since it is smaller than the sum of its proper divisors (70516846224).

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

27731341680 is a wasteful number, since it uses less digits than its factorization.

27731341680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16506774 (or 16506768 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 27731341680 in words is "twenty-seven billion, seven hundred thirty-one million, three hundred forty-one thousand, six hundred eighty".