27725537501 has 4 divisors (see below), whose sum is σ = 27750905052. Its totient is φ = 27700169952.

The previous prime is 27725537471. The next prime is 27725537557. The reversal of 27725537501 is 10573552772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13294320601 + 14431216900 = 115301^2 + 120130^2 .

It is a cyclic number.

It is not a de Polignac number, because 27725537501 - 2³⁴ = 10545668317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27725537591) 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, 12682136 + ... + 12684321.

It is an arithmetic number, because the mean of its divisors is an integer number (6937726263).

Almost surely, 2^27725537501 is an apocalyptic number.

It is an amenable number.

27725537501 is a deficient number, since it is larger than the sum of its proper divisors (25367551).

27725537501 is a wasteful number, since it uses less digits than its factorization.

27725537501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25367550.

The product of its (nonzero) digits is 514500, while the sum is 44.

The spelling of 27725537501 in words is "twenty-seven billion, seven hundred twenty-five million, five hundred thirty-seven thousand, five hundred one".