85242640497 has 32 divisors (see below), whose sum is σ = 136961003520. Its totient is φ = 46068445440.

The previous prime is 85242640487. The next prime is 85242640531. The reversal of 85242640497 is 79404624258.

It is not a de Polignac number, because 85242640497 - 2⁴ = 85242640481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85242640487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56472 + ... + 416742.

It is an arithmetic number, because the mean of its divisors is an integer number (4280031360).

Almost surely, 2^85242640497 is an apocalyptic number.

It is an amenable number.

85242640497 is a deficient number, since it is larger than the sum of its proper divisors (51718363023).

85242640497 is a wasteful number, since it uses less digits than its factorization.

85242640497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360893.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 85242640497 in words is "eighty-five billion, two hundred forty-two million, six hundred forty thousand, four hundred ninety-seven".