27961432528 has 10 divisors (see below), whose sum is σ = 54175275554. Its totient is φ = 13980716256.

The previous prime is 27961432523. The next prime is 27961432531. The reversal of 27961432528 is 82523416972.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27958515264 + 2917264 = 167208^2 + 1708^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27961432523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 873794751 + ... + 873794782.

Almost surely, 2^27961432528 is an apocalyptic number.

It is an amenable number.

27961432528 is a deficient number, since it is larger than the sum of its proper divisors (26213843026).

27961432528 is a wasteful number, since it uses less digits than its factorization.

27961432528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747589541 (or 1747589535 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 27961432528 in words is "twenty-seven billion, nine hundred sixty-one million, four hundred thirty-two thousand, five hundred twenty-eight".