87257257547 has 2 divisors, whose sum is σ = 87257257548. Its totient is φ = 87257257546.

The previous prime is 87257257537. The next prime is 87257257597. The reversal of 87257257547 is 74575275278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87257257547 - 2²² = 87253063243 is a prime.

It is a super-2 number, since 2×87257257547² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87257257537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43628628773 + 43628628774.

It is an arithmetic number, because the mean of its divisors is an integer number (43628628774).

Almost surely, 2^87257257547 is an apocalyptic number.

87257257547 is a deficient number, since it is larger than the sum of its proper divisors (1).

87257257547 is an equidigital number, since it uses as much as digits as its factorization.

87257257547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38416000, while the sum is 59.

The spelling of 87257257547 in words is "eighty-seven billion, two hundred fifty-seven million, two hundred fifty-seven thousand, five hundred forty-seven".