85451948237 has 2 divisors, whose sum is σ = 85451948238. Its totient is φ = 85451948236.

The previous prime is 85451948123. The next prime is 85451948251. The reversal of 85451948237 is 73284915458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46229730121 + 39222218116 = 215011^2 + 198046^2 .

It is a cyclic number.

It is not a de Polignac number, because 85451948237 - 2²⁶ = 85384839373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85451948537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42725974118 + 42725974119.

It is an arithmetic number, because the mean of its divisors is an integer number (42725974119).

Almost surely, 2^85451948237 is an apocalyptic number.

It is an amenable number.

85451948237 is a deficient number, since it is larger than the sum of its proper divisors (1).

85451948237 is an equidigital number, since it uses as much as digits as its factorization.

85451948237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9676800, while the sum is 56.

The spelling of 85451948237 in words is "eighty-five billion, four hundred fifty-one million, nine hundred forty-eight thousand, two hundred thirty-seven".