28601571457531 has 2 divisors, whose sum is σ = 28601571457532. Its totient is φ = 28601571457530.

The previous prime is 28601571457453. The next prime is 28601571457579. The reversal of 28601571457531 is 13575417510682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28601571457531 - 2¹⁷ = 28601571326459 is a prime.

It is a super-2 number, since 2×28601571457531² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28601571427531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14300785728765 + 14300785728766.

It is an arithmetic number, because the mean of its divisors is an integer number (14300785728766).

Almost surely, 2^{28601571457531} is an apocalyptic number.

28601571457531 is a deficient number, since it is larger than the sum of its proper divisors (1).

28601571457531 is an equidigital number, since it uses as much as digits as its factorization.

28601571457531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 28601571457531 in words is "twenty-eight trillion, six hundred one billion, five hundred seventy-one million, four hundred fifty-seven thousand, five hundred thirty-one".