85574517631 has 2 divisors, whose sum is σ = 85574517632. Its totient is φ = 85574517630.

The previous prime is 85574517593. The next prime is 85574517647. The reversal of 85574517631 is 13671547558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85574517631 - 2¹³ = 85574509439 is a prime.

It is a super-2 number, since 2×85574517631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85574517661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42787258815 + 42787258816.

It is an arithmetic number, because the mean of its divisors is an integer number (42787258816).

Almost surely, 2^85574517631 is an apocalyptic number.

85574517631 is a deficient number, since it is larger than the sum of its proper divisors (1).

85574517631 is an equidigital number, since it uses as much as digits as its factorization.

85574517631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528000, while the sum is 52.

The spelling of 85574517631 in words is "eighty-five billion, five hundred seventy-four million, five hundred seventeen thousand, six hundred thirty-one".