27961390468 has 12 divisors (see below), whose sum is σ = 53380836432. Its totient is φ = 12709722920.

The previous prime is 27961390459. The next prime is 27961390469. The reversal of 27961390468 is 86409316972.

It is a super-2 number, since 2×27961390468² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27961390469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317743030 + ... + 317743117.

It is an arithmetic number, because the mean of its divisors is an integer number (4448403036).

Almost surely, 2^27961390468 is an apocalyptic number.

It is an amenable number.

27961390468 is a deficient number, since it is larger than the sum of its proper divisors (25419445964).

27961390468 is a wasteful number, since it uses less digits than its factorization.

27961390468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635486162 (or 635486160 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 27961390468 in words is "twenty-seven billion, nine hundred sixty-one million, three hundred ninety thousand, four hundred sixty-eight".